CA1298200C - Process for producing a synergistic combination of amantadine and selegiline - Google Patents
Process for producing a synergistic combination of amantadine and selegilineInfo
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- CA1298200C CA1298200C CA000534793A CA534793A CA1298200C CA 1298200 C CA1298200 C CA 1298200C CA 000534793 A CA000534793 A CA 000534793A CA 534793 A CA534793 A CA 534793A CA 1298200 C CA1298200 C CA 1298200C
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- selegiline
- amantadine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/28—Compounds containing heavy metals
- A61K31/315—Zinc compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/13—Amines
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/24—Antidepressants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/26—Psychostimulants, e.g. nicotine, cocaine
Abstract
ABSTRACT OF THE DISCLOSURE
A synergistic pharmaceutical product containing a com-bination of amantadine and selegiline for controlling the Parkin-son's disease, depressions, narcolepsy and the organocerebral psychosyndrome.
A synergistic pharmaceutical product containing a com-bination of amantadine and selegiline for controlling the Parkin-son's disease, depressions, narcolepsy and the organocerebral psychosyndrome.
Description
2QI~) The present invention relates to a synerglstic combina-tion of amantadine and selegiline for controlling the Parkinson's disease, depressions, narcolepsy and the organocerebral psy-chosyndrome.
Amantadine is a virostatic agent and an anti-parkinso-nian drug. Its chemical name is l-aminoadamantane. Selegiline is an anti-depressant and an appetite suppressor. Its chemical name is N-(2~phenylisopropyl)-N-methyl-N-propyn-2-ylamine.
It has been found out unexpectedly that the efficacy of amantadine and i-ts pharmaceutically acceptable salts can be enhanced synergistically by the combination thereof with selegi-line or its pharmaceutically acceptable salts.
The present invention provides an improved pharmaceuti-cal product for treating Parkinson's disease.
The invention provides a combinatlon of the two active substances, amantadine and selegillne which substances may also be in the form of salts of biocompatible acids. The weight amounts or parts by weights specified herein always relate to the pure active ingredient not to its salts.
Preferably, amantadine and selegillne are in the form of pharmaceutically acceptable acid addition salts, particularly the salts of hydrohalic acids (e.g., the hydrochlorides) or organic acids (e.g., the citrates).
20a) 'l'he combinatiorl of the inventiorl exhibits, for instance, in tlle case Or Parkinsorl's disease, an unexpected synergistic effect onsi(lera~ly enllallced in comparison to the lnfluence of pure amantadllle. Selegiline alone, on the other hand, shows almost no antiparJcinson effect.
llle following exemplary experimental model is suitable for t~stirl~l antiparkinson effect.
~nimal~erimellts . .
~ rhe substances considered as antiparkinson drugs of the inventioll, are analyzed for in the striatum (brain area in the extrapyralllidal motor system - name for a part of the basal ganglia) of morlgolic jerboas on the basis of increased concelltration or increased conversion of dopamine (for example, conversion of dopamine into DOPAC = 3,4-dihydroxyphenylacetic acid or into holllovanilic acid = 3-methoxy-4-hydroxy-phenylacetic acid). Prepared striatulll samples are analyzed for dopamine using high-pressure li~uid chromatogrphy (IIPLC-ES~-ECD; see l;elice et al., J. Neurochelnistry 31 (197~), p.1461), and for homovanilic acid an(l ~r~c, using IIPLC-n~S-ECD (see Sperk, J. Neurochemistry 3~ (19~2), p ~0). Test anilllals of either sex and weight of 70 -30 g are selected for the experiments.
The su~stances are injected into the peritoneal cavity of the abdolllen of the animals in concentrations of 0.8 - 200 mg per ml selegiline hydrocllloride and 3 - 40 mg amantadine hydrochloride per ml respectively. Jerboas in groups of 5 r~ceive amantadine doses of 0.5 - 400 mgtkg respectively, for example, 1 - 100 mg/kg and selegiline doses of 0.04 - 200 mg/kg, for instarlce, 0.1 - 50 mg/kg, to determine the ED-50 values.
In order to determine the synergistic effect of the substances, different fractions or multiples (e.g., from 0.01 to 2) of the selegiline ED-50 dose are combined in each case. After various periods of time (e.g., after 0.5 - 6 hours) following the application of one of the substances or a combination of the substances, the animals are put to deattl and striatum samples are takell thereof.
~ rlle content of clopalllirle, DOP~C and homovanilic acid in the llolilogellized samples is determined by IIPLC.
'rhe synergistic effect of the substances of the invention becomes apparent when tlle clopamine, DOP~C and homovanilic acid results are higller than the respective values obtained when only one of tlle substal-lces is adllllllistered.
Experimellts with llumal!s 'l`he results of the antiparkinson action (of a drug) can be establishe~l, for installce, according to D.D. Webster, Med. Treat.
(N.Y.) 5, 257-2~2 (196~). Following the administration of amalltadille alone or the combination of the substances respectively, various symptoms as listed below are scored and weighted .
~ & ~0 1. slower motoricity of hands 2. rigidity (increase of muscle tone) 3. bent forward posture s 4. resonance of the upper extremities 5. gait 6. tremor 7. facial expression 8. seborrhea 9. speech pattern 10 independence.
An antl-parkinson effect ls present when the sum of values obtained from the Webster scale ~a so-called disability score) is smaller than the initial no-medication value (less than 30). The synergistic effect of the combination of the invention can be shown by comparing the disability scores obtained through the use of amantadine alone with the sum obtained when selegiline is applied additionally. In the latter case, the sum is lower and/or the effectiveness of amantadine is extended.
The synergistic increase of efficacy in man ls particu-larly noticeable when a combination containing at least 20 mg ofamantadine and at least 1 mg of selegiline is used.
The following is a description of the synergistic effect due to the use of the combination of the lnvention in early stages of the Parkinson's morbus.
o~
It is sensible to administer selegiline, a monooxidase-B inhibitor, at the earliest opportunity in order to slow down the progression of the disease. Since selegiline alone has not a sufficient effect on the improvement of the Parkinson's disease symptoms, it comes as a surprise that the relatively weak action of selegiline can be synergistically intensified by the simulta-neous administration of amantadine, the Webster score being reduced thereby.
Thus, a possibility of a therapeutic treatment of the disease in its early stages is available to the patient for the first time. The therapy slows down the progress of the Parkin-son's morbus and improves the symptoms to a satisfactory level while the side effects are reduced to a surprisingly low degree.
The synergistic effect of the combination of the inven-tion in crisis-like deterioration of the Parkinson's morbus ls as follows:
The akinetic crisis which improves relatively slowly after intravenous administration of amantadine, was surprisingly accelerated by the additional dosing of selegiline. The action of the combined components ls more pronounced and longer lasting than that of the components administered separately.
The following exemplary indications may be considered to evaluate the combinations of the invention:
Parkinson's morbus in all stages of sickness, depres-sions, narcolepsy, organocerebral psychosyndrome.
~ - 4a -Tl~e daily doses of the combination of the invention comprise for exalTIple 20 - ~000 mg, preferably 50 - 3000 mg, especially 100 - 2000 mg of amantac3ine and 1 - 250 mg, preferably 3 - 200 mg, especially ~ - 150 Ing of selegiline.
The c3aily doses may be administered once a day or in the form of 1 - 5, particularly 1 - 4 divlded doses per day.
Generally, the preferable dosage is 1 to 3 times, particularly once or twice daily. 13y way of example, the preferable dose of the amantadir1e/selegiline combination amounts to 100 - 400 mg of amantac~ c and ~ - 30 ITlg of selegiline administered 1 - 3 times a d~y, esE)ecially about 250 mg of amantadine and about 10 mg selegilille 1 to 3 times a day.
In a dosage unit, a following exemplary weight proportion of amanta(lil1e arld selec3iline is present.
1 part by weigl1t of selegiline is combined, for instance, witl1 0.4 - ~00 parts by wcigl1t oE amantadine, preferably with 1.2 - 200 parts of amantadille, particularly with 3.3 - 100 parts by weight of amalltadine.
~ y way of example, a pharmaceutical product may be easily formulated by the combination of 20 - 800 mg of amantadine and 1 - 50 mg of selegiline, pre~erably S0 - 600 mg amantadine and 3 -40 mg selegiline, particularly 100 - 400 mg amantadine and 4 - 30 mg selegiline, specifically 200 - 300 mg amantadine and 5 - 15 mg selegiline.
3i~
~ e weight amounts specified herein,above apply solely to holllogenous mixtures oE amantadine and selegiline (for instance, suppositories and single-layer tablets). In other formulations, for instance, capsules and bilaminar tablets, otller weight amounts oE the components may, of course, be combined as well.
A closage unit of the combination accordlng to the invention may comprise, for instance:
a) Eor oral drugs: 20 - ~00 mg of amantadine, preferably 50 - 600 mg, particularly 100 - 400 mg of amantadine and 1 - 50 mg, preEerably 3 - 40 mg, particularly 4 - 30 mg oE selegilille.
'lllese doses may be adllllrlistered, for instance, 1 to 5 tlmes, preferally 1 to 4 times, particularly 1 - 3 times daily.
b) for parenteral (e.c3., intravenous or intramuscular) c3ruc3s: 20 - ~00 mc3 oE amantadine, preferably 50 - 600 m9, particularly 100 - 400 mg o amantadine and 1 - 50 mc3~ preEera~ly 3 - ~0 mg, particularly 4 - 30 mg of sele~gi1ine. .~
ll`llese doses may be admillistered, for instance, 1 to 5 times, preEerably 1 to 4 times, particularly 1 - 3 times daily.
. .
c) for drugs for rectal or vaginal application: 20 - 800 mt~ amantadine, preferably 50 - 600 mg, particularly 100 - 400 mg of amantadlne and 1 - 50 mg, preferably 3 - 40 mg ~ particularly 4 - 30 mg of selegiline.
'Illesc doses may be administered, for example, 1 to 5 times, preferable 1 - 4 times, particularly 1 - 3 times daily.
d) for drugs to be applied on skin and mucous membranes, e.g., solutions, lotions, emulsions, ointments, plasters, etc.: 20 - 800 mg of amantadine, preferably 50 - 600 mg~ particularly 100 - 400 mg of amantadine and 1 - 50 mg, preferclbly 3 - 40 mg, particularly 4 - 30 mg of sele~iline.
ll~ese doses may be admirlistered, for instance, 1 - 5 times~
preferably 1 - 4 times, particularly 1 - 3 times daily.
Naturally, it is also possible to make galenic preparations that would irlclude 2 to, for instance, 6 times tlle above-specifie(l dosac3e unit amourlts.
ln eacll case, the doses and parts by weight specified hereitlabove for admirlistration to humans, relate to the free bases.
~Z~
TIIe c~cute toxicity of the combination (of the invention) in mice as a~ministered orally, amounts to 600 - 700 mg/kg for an exemplary combination of amantadlne (IICl salt) and selegiline (IICl salt) at a weight ratio of 10:1 ~expressed by the LD 50 mg/kcJ; I,itcIIfield Wilcoxon method, J. Pharmacal. Exper. Ther.
95:99, 1959).
The combination of the invention is suitable for manufacturin(3 pIIarmaceutical compositions and preparations. The combination constitutes an active ingredient in the formulations of the pIIarmaceutical compositions or drugs. The individual active in-Jredients of the combination, however, can also be used in seE)ara~e Eormulations wllerein the above-specified amounts of active ingredieIlts apply in each case to the respectlve dosage UI1it. l`he active ingredierIts or their combination may be mixed, if necd be, witI1 other pharmacologically or pharmaceutically effective su~stances.
TIIe plIarlllaceutical products can be manufactured in a known manner whereirI knowrI converItional pharmaceutical inactive ingredients as well as otlIer usual vehicles and diluents may be used.
'l`he substances to be considered for use as such vehicles and inactive ingredients are, for instance, those recommended or listed as such ingredients for pharmaceutical, cosmetical and related purposes in the following references: Ullmanns Encyclopaedia o~ Chemical Technology, Vol. 4 (1953), pages 1-39;
.... - ~
~rnal of Pl1armaceutical Sciences, Vol. 52 ~1963), p.91~ and the following; Il.v. Czetscl1-Lil1derlwald, liilEstoffe fuer Pharmazie und arl(3rel17ellde Gebiete (Inactive ingredients for pharmaceutieal and rela~ed applications); Pharm. Ind., Part 2, 1961, page 72 and foll.; I)r. Il.P. Fiedler, Lexicon der ~ilfstoffe fuer Pharmazie, Kosmetik und angrenzel1de Gebiete (Dietionary of inaetive ingredients for pharmaceutical, eosmetieal and related applications) Cantor KG, ~ulendorf in Wuerttemberg 1981.
'l'he following are examples of the vehieles and inactive ingredients: gelatin, natural sugar sueh as saecharose or lactose, lccithil1, pectin, stareh (for example, eorn stareh), eyelodextril1es and tlleir derivatives, polyvinylpyrrolidone, gum arabie (acacia), alginic acid, tylose, taleum, lyeopodium, silieic acid (e.g., colloidal), cellulose, cellulose derivatives (for instal1ce, cellulose ethers in which the eellulose hydroxyl groups are etl1erified in part with low saturated aliphatie alcollols anc1/or low saturated aliphatie oxy-alcohols, for instance, met:hyloxyproE)yl cellulose, methyl eellulose, hydroxy-propylmet:hyl eellulose, hydroxypropylmethyl eellulose phthalate), stearates, magllesiulll salts alld caleium salts of fatty aeids with 12 - 22 earbon atoms, particularly saturated fatty acids (e.g., stearic acid), emulsifiers, oils and fats, partieularly vegetable oils (e.g., peanut oil, castor oil, olive oil, sesame oilr eottonseed oil, corn oil, wheat germ oil, sunflower seed oil, eod liver oil, mono, di and triglycerides of saturated fatty aeids from C121l2~02 tO C1~ll3602 and their mixtures), pharmaceutieally compati~le monovalent or polyvalent aleohols and polyglyeols sueh g ... ,. ~ . ...............
as polyetllylene glycols as well as their derivatives, esters of satur.lted or ullsaturated alipllatic fatty acids (2 - 22 carbon at;otns, particularly 10 - 18 carbon atoms) wlth univalent aliphatic alcollols (1 - 20 carbon atoms) or multivalent alcohols such as glycols, glycerin, diethylene glycol, pentaerythritol, sorbitol, mannitol, etc., which can also be etherified, if need be, esters of citric acid with primary alcohols and acetic acid, benzyl benzoate, dioxolanes, glycerin formals, tetrahydrofurfuryl alcollol, polyglycol ethers with C1-C12 alcohols, dimethylacetamide, lactamides, lac~ates, ethyl carbonates, silicones (particularly poly[dimethylsiloxanes] of medium viscosity), calciuln car~onate, sodium carbonate,calcium phosphate, sodillm phosphate, magtlesium carbonate and tlle like.
Some substances known as disintegrants, i.e., t}-ose that cause decompositioll, are also suitable as inactive agents, i.e., cross~ ked polyvinylpyrrolidone, sodium carboxymethyl starch, sodiulll carboxymethyl celltllose or micro-crystalline cellulose.
Knowtl coatirlg substances such as, e.g., polyacrylic ester, cellulosc etller alld the lilce, may also be employed.
Solutiolls oE the compositions of the lnvention may be prepared using e~g., water or physiologically tolerated organic solvents such as, for installce, ethanol, 1, 2 - propylene glycol, polyglycols and their derivatives, dimethyl sulfoxide, fatty alcollols, triglycerides, partial esters of glycerin, paraffin and the like. For preparing injectable solutions or suspensions, ~2.~;~U3 n~n-toxic parenteral well-tolerated diluents or solvents may be considerc(l, for instance, water, 1,3-butandiol, ethanol, 1,3-propylcne glycol, polyglycols mixed with water~ ~inger'5 solution, isotonic saline solution or also hydrogenated oils includirlg synthetic monoglycerides or diglycerides of fatty acids such as oleinic acid.
Known conventional solubilisers or emulsifiers respectively may be applied for preparinc3 the formulations. Such solubilisers and emulsifierss may be, for example, polyvinylpyrrolidone, sorbitol fatty acid esters such as sorbitol trioleate, phospllatides (phospllolipides) such as acacia, tragacanth, polyoxyethylated sorbitol monooleate and other ethoxylated fatty esters of sorbitol, polyoxyethylated fats, polyoxyethylated oleotL~ lycerides, linolated oleotriglycerides, products of condellsLltioll o~ polyetllylelle oxide with fatty alcohols, alkylpllellols or Eatty acids or also 1-methyl-3~2-hydroxyethyl) -imidazolidorle-(2). In this context, "polyoxyethylated" means that the substallces in question have polyoxyethylene chains with the de(Jree of polymerization generally between 2 and 40, particularly between 10 alld 20.
Sucll polyoxyethylated compounds may be obtained e.g., by reactirl~3 compoullds containing hydroxyl groups ~for instance, monoglycerides or diglycerides or unsaturated compounds such as, e.g., compounds containiny oleic acid radicals) with ethylene oxide (for example, 40 moles of ethylene oxide per one mole of glyceride~.
~ live oil, peanut oil, castor oil, sesame oil, cottonseed oil an~l corn oil are exemplary oleotriglycerides.
See also Dr. ~I.P. Fiedler "Lexikon der 1311fstoffe fuer Pllarmazie, Y~osmetik und anc3ren7ende Gebiete" 1971, p.191-195.
Moreover, preservatives, stabilisers, buffers, e.g., calcium hydroc3etl phospllate, colloidal aluminum hydroxide, taste corrigents, sweeteners, colors, antioxidants and complexing agents ~e.g., ethylenediamilletetraacetic acid - ~DT~) and the like may also be added. For molecular stabilization of the actlve substances, if necessary, the pll should be adjusted to ca.
3 - 7 using physiologically tolerated acids or buffers.
Generally, a possibly neutral or weak-acid pl{ value (up to pll S) i5 preferable.
Examples of the antioxidallts suitable for those applications are sodium metabisulfite, ascorbic acid, gallic acid, alkyl gallates, butyl hydroxyallisole, nordihydroguaiaretic acid, tocophel:ols and their compositiolls with synergists (substances that form complexes with lleavy metals, e.g., lecithin, ascorbic acid, pllosplloric acid). ~llle antioxidating effect of the tocopherols is enhanced significantly by the addltion of the synergists.
'lhe preservatives to be considered are, for instance, sorbie acid, p-llydroxybenzoic acid esters, (e.g., low-alkyl benzoates, benzoic acid, sodium benzoate, triehloroisobutanol, phenol, eresol, benzethorlium chloride and formalin derivatlves.
'lhe pl~armaceutical and galenie handling of the actlve substances is conducted in accordance with the usual standard methods. For instance, the active substance(s) and inaetive ingredierlts or carriers respectively can be well-mixed by stirrisly or homogellizatioll (e g., by means of eonventional mixing devices), the operation being earried out generally at temperiltures of 20 - ~0C, pre~erably 20 - 50C, particularly at room temperature. In otller cases, the following standard reference may be consulted: Pharmazeutisehe Teehnologie by Sueker, I;uclls arld Speiser, Tllieme-Verlag Stuttgart, 1978.
'rlle preparations of the invention may be applied on the skin or mueous melllbralles; intracorporal administation, e.g., oral, peroral, pulmollie, enteral, reetal, nasal, vaginal, lingual, intravellous, intra-arterial, intraeardiae, intramuseular, intra~eritoneal, intracutaneous, subeutaneous use is also aeeeptable. In tlle ease of parenteral preparation forms, sterile or sterilized products respectively should be prepared in particular.
Ihe combir1ation of tl1e invention may also be provided as a product containin~ each of tl1e two actlve substances in the form of a seE)arate Eormulation so that the active substances may be administered separately or .also in successlvely reduced doses.
Should such separate Eormulatlons be available, they are coordinated with each other to contain in a dosage unit the respective active substances in the same amounts and correspot1ding weigllt proportions as in the combined mixture.
Il1 tl1e case of separate use, the two components of the combil1ation of tlle invention may also be administered non-concurrelltly. In sucl1 cases, selegiline can be admlnistered, for instal1ce, once a day ~5 - 30 mg dose Eor example) and amantadine ~ivel1 collcurrel1tly (50 - 200 mg dose for example) and then ln 3 -Eurther doses (50 - 200 mg Eor instance) at 4-hour intervals.
ln liquid preparations, the concentration of amantadine is e.g., 2 - 10, preferably ~ - 6, particularly 5 percent by weight al1d tlle concentration of selegilille is 0.1 - 1, preferably 0.3 -0.5, particularly 0.375'~ by weight.
ln preparatiol1s wl1ereirl tl1e combination of tl1e invention ls suspellded and llolllogel1ized in molten hard fat, 10 - 50 parts by weigl1t oE l1ard Eat, Eor instance, are used per 1 part ky weight of amantadine ~in the combination) or per 1 part by weight of selegiline (in tl1e case wl1en the selegiline is present as a 12~?~
separate formulation). Wher1 necessary, 0.01 - 1 part by weight ( itl relatiot1 to 1 part by weight of amantadine) of soybean lecitl~ may also be admixed additionally.
For manufacturing the preparations in the tablet or capsule form, 0.01 - 0.5 parts by weight of starch or gelatin or 0.005 -0.3 parts by weigl1t of vinylpyrrolidone/vinyl acetate copolymer is used as granulation additive per 1 part by weight of amantadit1e (in tl1e combination) or per 1 part by weight of selegiline (when selegiline is present in a separate formulation). If necessary, the above may be preceded by admixincJ 0.01 - 10 parts by weight, preferably 0.05 - 1 parts by weigllt of calcium l-ydroger1 phosphate per 1 part by weight of amantadil1e (in the combil1ation) or per 1 part by weight of selegilille (when selegiline is present in a separate formu]atiol1). The granular Eorm thus obtained may be dried with air at a telllperature oE 50 - 70C.
The dLy granular powder may be further homogenously mixed with 0.005 to 0.1 parts by weight oE magnesium stearate, 0.001 -0.1 parts by welght oE silicon dioxide and/or 0.05 - 2 parts by weight oE starch. The parts by weight specified above relate in each case to 1 part by weigl-lt of amantadine (in the combination) or to 1 part by weight of selegiline (when selegiline is present in a separate formulation).
l~xample 1 InJectlor1 solution containlng 100 mg amantadine hyc1rocllloride and 7.5 mg selegiline hydrochloride.
25 g amantadine hydrocl1loride and 1.875 g selegiline hydrocllloride were dissolved successively in 450 ml of water for injections charged with l1itrogen. The solution was made up to 500 ml witl1 water for injections charged with rlitrogen.
Following a thorougl1 mixing, the solution, being still saturated Witll nitroger1 was sterilized by filtration through a glass fiber prefilter and a 0.2 11 melllbrane filter. The flltrate, under aseptic collditiolls at1c1 saturation with nitrogen, was poured lnto colorless 2 ml ampoules. In 2 ml, the solution contains 100 mg o alllal1t.ldine hydrochloride and 7.5 mg of selegiline hydroclllorl.(le .
xample 2 Capsules containing 100 rng amantadine hydrochloride and 7.5 m9 selec3ilille hydroc~lloride.
10 kg of amantadine hydrochloride was mixed intensively with 0.75 kg of selegiline hydrochloride using a suitable mixing device~ 'l'lle mixture was then granulated in a known manner in a fluidized bed-spray granulator with a solution of 0.25 kg of gelatin in 2.25 kg water. To the granulated mixture, 0.85 kg of corn starcll, 0.1 kg of magnesium stearate and 0.05 kg of highly dispersed silicon dioxide were admixed. The product was poured ln si~,e 2 hard gelatin capsules, a 120 mg portion ln each capsule. One capsule contains 100 mg of amantadine hydrochloride and 7.5 mg of selegiline llydrochloride.
Amantadine is a virostatic agent and an anti-parkinso-nian drug. Its chemical name is l-aminoadamantane. Selegiline is an anti-depressant and an appetite suppressor. Its chemical name is N-(2~phenylisopropyl)-N-methyl-N-propyn-2-ylamine.
It has been found out unexpectedly that the efficacy of amantadine and i-ts pharmaceutically acceptable salts can be enhanced synergistically by the combination thereof with selegi-line or its pharmaceutically acceptable salts.
The present invention provides an improved pharmaceuti-cal product for treating Parkinson's disease.
The invention provides a combinatlon of the two active substances, amantadine and selegillne which substances may also be in the form of salts of biocompatible acids. The weight amounts or parts by weights specified herein always relate to the pure active ingredient not to its salts.
Preferably, amantadine and selegillne are in the form of pharmaceutically acceptable acid addition salts, particularly the salts of hydrohalic acids (e.g., the hydrochlorides) or organic acids (e.g., the citrates).
20a) 'l'he combinatiorl of the inventiorl exhibits, for instance, in tlle case Or Parkinsorl's disease, an unexpected synergistic effect onsi(lera~ly enllallced in comparison to the lnfluence of pure amantadllle. Selegiline alone, on the other hand, shows almost no antiparJcinson effect.
llle following exemplary experimental model is suitable for t~stirl~l antiparkinson effect.
~nimal~erimellts . .
~ rhe substances considered as antiparkinson drugs of the inventioll, are analyzed for in the striatum (brain area in the extrapyralllidal motor system - name for a part of the basal ganglia) of morlgolic jerboas on the basis of increased concelltration or increased conversion of dopamine (for example, conversion of dopamine into DOPAC = 3,4-dihydroxyphenylacetic acid or into holllovanilic acid = 3-methoxy-4-hydroxy-phenylacetic acid). Prepared striatulll samples are analyzed for dopamine using high-pressure li~uid chromatogrphy (IIPLC-ES~-ECD; see l;elice et al., J. Neurochelnistry 31 (197~), p.1461), and for homovanilic acid an(l ~r~c, using IIPLC-n~S-ECD (see Sperk, J. Neurochemistry 3~ (19~2), p ~0). Test anilllals of either sex and weight of 70 -30 g are selected for the experiments.
The su~stances are injected into the peritoneal cavity of the abdolllen of the animals in concentrations of 0.8 - 200 mg per ml selegiline hydrocllloride and 3 - 40 mg amantadine hydrochloride per ml respectively. Jerboas in groups of 5 r~ceive amantadine doses of 0.5 - 400 mgtkg respectively, for example, 1 - 100 mg/kg and selegiline doses of 0.04 - 200 mg/kg, for instarlce, 0.1 - 50 mg/kg, to determine the ED-50 values.
In order to determine the synergistic effect of the substances, different fractions or multiples (e.g., from 0.01 to 2) of the selegiline ED-50 dose are combined in each case. After various periods of time (e.g., after 0.5 - 6 hours) following the application of one of the substances or a combination of the substances, the animals are put to deattl and striatum samples are takell thereof.
~ rlle content of clopalllirle, DOP~C and homovanilic acid in the llolilogellized samples is determined by IIPLC.
'rhe synergistic effect of the substances of the invention becomes apparent when tlle clopamine, DOP~C and homovanilic acid results are higller than the respective values obtained when only one of tlle substal-lces is adllllllistered.
Experimellts with llumal!s 'l`he results of the antiparkinson action (of a drug) can be establishe~l, for installce, according to D.D. Webster, Med. Treat.
(N.Y.) 5, 257-2~2 (196~). Following the administration of amalltadille alone or the combination of the substances respectively, various symptoms as listed below are scored and weighted .
~ & ~0 1. slower motoricity of hands 2. rigidity (increase of muscle tone) 3. bent forward posture s 4. resonance of the upper extremities 5. gait 6. tremor 7. facial expression 8. seborrhea 9. speech pattern 10 independence.
An antl-parkinson effect ls present when the sum of values obtained from the Webster scale ~a so-called disability score) is smaller than the initial no-medication value (less than 30). The synergistic effect of the combination of the invention can be shown by comparing the disability scores obtained through the use of amantadine alone with the sum obtained when selegiline is applied additionally. In the latter case, the sum is lower and/or the effectiveness of amantadine is extended.
The synergistic increase of efficacy in man ls particu-larly noticeable when a combination containing at least 20 mg ofamantadine and at least 1 mg of selegiline is used.
The following is a description of the synergistic effect due to the use of the combination of the lnvention in early stages of the Parkinson's morbus.
o~
It is sensible to administer selegiline, a monooxidase-B inhibitor, at the earliest opportunity in order to slow down the progression of the disease. Since selegiline alone has not a sufficient effect on the improvement of the Parkinson's disease symptoms, it comes as a surprise that the relatively weak action of selegiline can be synergistically intensified by the simulta-neous administration of amantadine, the Webster score being reduced thereby.
Thus, a possibility of a therapeutic treatment of the disease in its early stages is available to the patient for the first time. The therapy slows down the progress of the Parkin-son's morbus and improves the symptoms to a satisfactory level while the side effects are reduced to a surprisingly low degree.
The synergistic effect of the combination of the inven-tion in crisis-like deterioration of the Parkinson's morbus ls as follows:
The akinetic crisis which improves relatively slowly after intravenous administration of amantadine, was surprisingly accelerated by the additional dosing of selegiline. The action of the combined components ls more pronounced and longer lasting than that of the components administered separately.
The following exemplary indications may be considered to evaluate the combinations of the invention:
Parkinson's morbus in all stages of sickness, depres-sions, narcolepsy, organocerebral psychosyndrome.
~ - 4a -Tl~e daily doses of the combination of the invention comprise for exalTIple 20 - ~000 mg, preferably 50 - 3000 mg, especially 100 - 2000 mg of amantac3ine and 1 - 250 mg, preferably 3 - 200 mg, especially ~ - 150 Ing of selegiline.
The c3aily doses may be administered once a day or in the form of 1 - 5, particularly 1 - 4 divlded doses per day.
Generally, the preferable dosage is 1 to 3 times, particularly once or twice daily. 13y way of example, the preferable dose of the amantadir1e/selegiline combination amounts to 100 - 400 mg of amantac~ c and ~ - 30 ITlg of selegiline administered 1 - 3 times a d~y, esE)ecially about 250 mg of amantadine and about 10 mg selegilille 1 to 3 times a day.
In a dosage unit, a following exemplary weight proportion of amanta(lil1e arld selec3iline is present.
1 part by weigl1t of selegiline is combined, for instance, witl1 0.4 - ~00 parts by wcigl1t oE amantadine, preferably with 1.2 - 200 parts of amantadille, particularly with 3.3 - 100 parts by weight of amalltadine.
~ y way of example, a pharmaceutical product may be easily formulated by the combination of 20 - 800 mg of amantadine and 1 - 50 mg of selegiline, pre~erably S0 - 600 mg amantadine and 3 -40 mg selegiline, particularly 100 - 400 mg amantadine and 4 - 30 mg selegiline, specifically 200 - 300 mg amantadine and 5 - 15 mg selegiline.
3i~
~ e weight amounts specified herein,above apply solely to holllogenous mixtures oE amantadine and selegiline (for instance, suppositories and single-layer tablets). In other formulations, for instance, capsules and bilaminar tablets, otller weight amounts oE the components may, of course, be combined as well.
A closage unit of the combination accordlng to the invention may comprise, for instance:
a) Eor oral drugs: 20 - ~00 mg of amantadine, preferably 50 - 600 mg, particularly 100 - 400 mg of amantadine and 1 - 50 mg, preEerably 3 - 40 mg, particularly 4 - 30 mg oE selegilille.
'lllese doses may be adllllrlistered, for instance, 1 to 5 tlmes, preferally 1 to 4 times, particularly 1 - 3 times daily.
b) for parenteral (e.c3., intravenous or intramuscular) c3ruc3s: 20 - ~00 mc3 oE amantadine, preferably 50 - 600 m9, particularly 100 - 400 mg o amantadine and 1 - 50 mc3~ preEera~ly 3 - ~0 mg, particularly 4 - 30 mg of sele~gi1ine. .~
ll`llese doses may be admillistered, for instance, 1 to 5 times, preEerably 1 to 4 times, particularly 1 - 3 times daily.
. .
c) for drugs for rectal or vaginal application: 20 - 800 mt~ amantadine, preferably 50 - 600 mg, particularly 100 - 400 mg of amantadlne and 1 - 50 mg, preferably 3 - 40 mg ~ particularly 4 - 30 mg of selegiline.
'Illesc doses may be administered, for example, 1 to 5 times, preferable 1 - 4 times, particularly 1 - 3 times daily.
d) for drugs to be applied on skin and mucous membranes, e.g., solutions, lotions, emulsions, ointments, plasters, etc.: 20 - 800 mg of amantadine, preferably 50 - 600 mg~ particularly 100 - 400 mg of amantadine and 1 - 50 mg, preferclbly 3 - 40 mg, particularly 4 - 30 mg of sele~iline.
ll~ese doses may be admirlistered, for instance, 1 - 5 times~
preferably 1 - 4 times, particularly 1 - 3 times daily.
Naturally, it is also possible to make galenic preparations that would irlclude 2 to, for instance, 6 times tlle above-specifie(l dosac3e unit amourlts.
ln eacll case, the doses and parts by weight specified hereitlabove for admirlistration to humans, relate to the free bases.
~Z~
TIIe c~cute toxicity of the combination (of the invention) in mice as a~ministered orally, amounts to 600 - 700 mg/kg for an exemplary combination of amantadlne (IICl salt) and selegiline (IICl salt) at a weight ratio of 10:1 ~expressed by the LD 50 mg/kcJ; I,itcIIfield Wilcoxon method, J. Pharmacal. Exper. Ther.
95:99, 1959).
The combination of the invention is suitable for manufacturin(3 pIIarmaceutical compositions and preparations. The combination constitutes an active ingredient in the formulations of the pIIarmaceutical compositions or drugs. The individual active in-Jredients of the combination, however, can also be used in seE)ara~e Eormulations wllerein the above-specified amounts of active ingredieIlts apply in each case to the respectlve dosage UI1it. l`he active ingredierIts or their combination may be mixed, if necd be, witI1 other pharmacologically or pharmaceutically effective su~stances.
TIIe plIarlllaceutical products can be manufactured in a known manner whereirI knowrI converItional pharmaceutical inactive ingredients as well as otlIer usual vehicles and diluents may be used.
'l`he substances to be considered for use as such vehicles and inactive ingredients are, for instance, those recommended or listed as such ingredients for pharmaceutical, cosmetical and related purposes in the following references: Ullmanns Encyclopaedia o~ Chemical Technology, Vol. 4 (1953), pages 1-39;
.... - ~
~rnal of Pl1armaceutical Sciences, Vol. 52 ~1963), p.91~ and the following; Il.v. Czetscl1-Lil1derlwald, liilEstoffe fuer Pharmazie und arl(3rel17ellde Gebiete (Inactive ingredients for pharmaceutieal and rela~ed applications); Pharm. Ind., Part 2, 1961, page 72 and foll.; I)r. Il.P. Fiedler, Lexicon der ~ilfstoffe fuer Pharmazie, Kosmetik und angrenzel1de Gebiete (Dietionary of inaetive ingredients for pharmaceutical, eosmetieal and related applications) Cantor KG, ~ulendorf in Wuerttemberg 1981.
'l'he following are examples of the vehieles and inactive ingredients: gelatin, natural sugar sueh as saecharose or lactose, lccithil1, pectin, stareh (for example, eorn stareh), eyelodextril1es and tlleir derivatives, polyvinylpyrrolidone, gum arabie (acacia), alginic acid, tylose, taleum, lyeopodium, silieic acid (e.g., colloidal), cellulose, cellulose derivatives (for instal1ce, cellulose ethers in which the eellulose hydroxyl groups are etl1erified in part with low saturated aliphatie alcollols anc1/or low saturated aliphatie oxy-alcohols, for instance, met:hyloxyproE)yl cellulose, methyl eellulose, hydroxy-propylmet:hyl eellulose, hydroxypropylmethyl eellulose phthalate), stearates, magllesiulll salts alld caleium salts of fatty aeids with 12 - 22 earbon atoms, particularly saturated fatty acids (e.g., stearic acid), emulsifiers, oils and fats, partieularly vegetable oils (e.g., peanut oil, castor oil, olive oil, sesame oilr eottonseed oil, corn oil, wheat germ oil, sunflower seed oil, eod liver oil, mono, di and triglycerides of saturated fatty aeids from C121l2~02 tO C1~ll3602 and their mixtures), pharmaceutieally compati~le monovalent or polyvalent aleohols and polyglyeols sueh g ... ,. ~ . ...............
as polyetllylene glycols as well as their derivatives, esters of satur.lted or ullsaturated alipllatic fatty acids (2 - 22 carbon at;otns, particularly 10 - 18 carbon atoms) wlth univalent aliphatic alcollols (1 - 20 carbon atoms) or multivalent alcohols such as glycols, glycerin, diethylene glycol, pentaerythritol, sorbitol, mannitol, etc., which can also be etherified, if need be, esters of citric acid with primary alcohols and acetic acid, benzyl benzoate, dioxolanes, glycerin formals, tetrahydrofurfuryl alcollol, polyglycol ethers with C1-C12 alcohols, dimethylacetamide, lactamides, lac~ates, ethyl carbonates, silicones (particularly poly[dimethylsiloxanes] of medium viscosity), calciuln car~onate, sodium carbonate,calcium phosphate, sodillm phosphate, magtlesium carbonate and tlle like.
Some substances known as disintegrants, i.e., t}-ose that cause decompositioll, are also suitable as inactive agents, i.e., cross~ ked polyvinylpyrrolidone, sodium carboxymethyl starch, sodiulll carboxymethyl celltllose or micro-crystalline cellulose.
Knowtl coatirlg substances such as, e.g., polyacrylic ester, cellulosc etller alld the lilce, may also be employed.
Solutiolls oE the compositions of the lnvention may be prepared using e~g., water or physiologically tolerated organic solvents such as, for installce, ethanol, 1, 2 - propylene glycol, polyglycols and their derivatives, dimethyl sulfoxide, fatty alcollols, triglycerides, partial esters of glycerin, paraffin and the like. For preparing injectable solutions or suspensions, ~2.~;~U3 n~n-toxic parenteral well-tolerated diluents or solvents may be considerc(l, for instance, water, 1,3-butandiol, ethanol, 1,3-propylcne glycol, polyglycols mixed with water~ ~inger'5 solution, isotonic saline solution or also hydrogenated oils includirlg synthetic monoglycerides or diglycerides of fatty acids such as oleinic acid.
Known conventional solubilisers or emulsifiers respectively may be applied for preparinc3 the formulations. Such solubilisers and emulsifierss may be, for example, polyvinylpyrrolidone, sorbitol fatty acid esters such as sorbitol trioleate, phospllatides (phospllolipides) such as acacia, tragacanth, polyoxyethylated sorbitol monooleate and other ethoxylated fatty esters of sorbitol, polyoxyethylated fats, polyoxyethylated oleotL~ lycerides, linolated oleotriglycerides, products of condellsLltioll o~ polyetllylelle oxide with fatty alcohols, alkylpllellols or Eatty acids or also 1-methyl-3~2-hydroxyethyl) -imidazolidorle-(2). In this context, "polyoxyethylated" means that the substallces in question have polyoxyethylene chains with the de(Jree of polymerization generally between 2 and 40, particularly between 10 alld 20.
Sucll polyoxyethylated compounds may be obtained e.g., by reactirl~3 compoullds containing hydroxyl groups ~for instance, monoglycerides or diglycerides or unsaturated compounds such as, e.g., compounds containiny oleic acid radicals) with ethylene oxide (for example, 40 moles of ethylene oxide per one mole of glyceride~.
~ live oil, peanut oil, castor oil, sesame oil, cottonseed oil an~l corn oil are exemplary oleotriglycerides.
See also Dr. ~I.P. Fiedler "Lexikon der 1311fstoffe fuer Pllarmazie, Y~osmetik und anc3ren7ende Gebiete" 1971, p.191-195.
Moreover, preservatives, stabilisers, buffers, e.g., calcium hydroc3etl phospllate, colloidal aluminum hydroxide, taste corrigents, sweeteners, colors, antioxidants and complexing agents ~e.g., ethylenediamilletetraacetic acid - ~DT~) and the like may also be added. For molecular stabilization of the actlve substances, if necessary, the pll should be adjusted to ca.
3 - 7 using physiologically tolerated acids or buffers.
Generally, a possibly neutral or weak-acid pl{ value (up to pll S) i5 preferable.
Examples of the antioxidallts suitable for those applications are sodium metabisulfite, ascorbic acid, gallic acid, alkyl gallates, butyl hydroxyallisole, nordihydroguaiaretic acid, tocophel:ols and their compositiolls with synergists (substances that form complexes with lleavy metals, e.g., lecithin, ascorbic acid, pllosplloric acid). ~llle antioxidating effect of the tocopherols is enhanced significantly by the addltion of the synergists.
'lhe preservatives to be considered are, for instance, sorbie acid, p-llydroxybenzoic acid esters, (e.g., low-alkyl benzoates, benzoic acid, sodium benzoate, triehloroisobutanol, phenol, eresol, benzethorlium chloride and formalin derivatlves.
'lhe pl~armaceutical and galenie handling of the actlve substances is conducted in accordance with the usual standard methods. For instance, the active substance(s) and inaetive ingredierlts or carriers respectively can be well-mixed by stirrisly or homogellizatioll (e g., by means of eonventional mixing devices), the operation being earried out generally at temperiltures of 20 - ~0C, pre~erably 20 - 50C, particularly at room temperature. In otller cases, the following standard reference may be consulted: Pharmazeutisehe Teehnologie by Sueker, I;uclls arld Speiser, Tllieme-Verlag Stuttgart, 1978.
'rlle preparations of the invention may be applied on the skin or mueous melllbralles; intracorporal administation, e.g., oral, peroral, pulmollie, enteral, reetal, nasal, vaginal, lingual, intravellous, intra-arterial, intraeardiae, intramuseular, intra~eritoneal, intracutaneous, subeutaneous use is also aeeeptable. In tlle ease of parenteral preparation forms, sterile or sterilized products respectively should be prepared in particular.
Ihe combir1ation of tl1e invention may also be provided as a product containin~ each of tl1e two actlve substances in the form of a seE)arate Eormulation so that the active substances may be administered separately or .also in successlvely reduced doses.
Should such separate Eormulatlons be available, they are coordinated with each other to contain in a dosage unit the respective active substances in the same amounts and correspot1ding weigllt proportions as in the combined mixture.
Il1 tl1e case of separate use, the two components of the combil1ation of tlle invention may also be administered non-concurrelltly. In sucl1 cases, selegiline can be admlnistered, for instal1ce, once a day ~5 - 30 mg dose Eor example) and amantadine ~ivel1 collcurrel1tly (50 - 200 mg dose for example) and then ln 3 -Eurther doses (50 - 200 mg Eor instance) at 4-hour intervals.
ln liquid preparations, the concentration of amantadine is e.g., 2 - 10, preferably ~ - 6, particularly 5 percent by weight al1d tlle concentration of selegilille is 0.1 - 1, preferably 0.3 -0.5, particularly 0.375'~ by weight.
ln preparatiol1s wl1ereirl tl1e combination of tl1e invention ls suspellded and llolllogel1ized in molten hard fat, 10 - 50 parts by weigl1t oE l1ard Eat, Eor instance, are used per 1 part ky weight of amantadine ~in the combination) or per 1 part by weight of selegiline (in tl1e case wl1en the selegiline is present as a 12~?~
separate formulation). Wher1 necessary, 0.01 - 1 part by weight ( itl relatiot1 to 1 part by weight of amantadine) of soybean lecitl~ may also be admixed additionally.
For manufacturing the preparations in the tablet or capsule form, 0.01 - 0.5 parts by weight of starch or gelatin or 0.005 -0.3 parts by weigl1t of vinylpyrrolidone/vinyl acetate copolymer is used as granulation additive per 1 part by weight of amantadit1e (in tl1e combination) or per 1 part by weight of selegiline (when selegiline is present in a separate formulation). If necessary, the above may be preceded by admixincJ 0.01 - 10 parts by weight, preferably 0.05 - 1 parts by weigllt of calcium l-ydroger1 phosphate per 1 part by weight of amantadil1e (in the combil1ation) or per 1 part by weight of selegilille (when selegiline is present in a separate formu]atiol1). The granular Eorm thus obtained may be dried with air at a telllperature oE 50 - 70C.
The dLy granular powder may be further homogenously mixed with 0.005 to 0.1 parts by weight oE magnesium stearate, 0.001 -0.1 parts by welght oE silicon dioxide and/or 0.05 - 2 parts by weight oE starch. The parts by weight specified above relate in each case to 1 part by weigl-lt of amantadine (in the combination) or to 1 part by weight of selegiline (when selegiline is present in a separate formulation).
l~xample 1 InJectlor1 solution containlng 100 mg amantadine hyc1rocllloride and 7.5 mg selegiline hydrochloride.
25 g amantadine hydrocl1loride and 1.875 g selegiline hydrocllloride were dissolved successively in 450 ml of water for injections charged with l1itrogen. The solution was made up to 500 ml witl1 water for injections charged with rlitrogen.
Following a thorougl1 mixing, the solution, being still saturated Witll nitroger1 was sterilized by filtration through a glass fiber prefilter and a 0.2 11 melllbrane filter. The flltrate, under aseptic collditiolls at1c1 saturation with nitrogen, was poured lnto colorless 2 ml ampoules. In 2 ml, the solution contains 100 mg o alllal1t.ldine hydrochloride and 7.5 mg of selegiline hydroclllorl.(le .
xample 2 Capsules containing 100 rng amantadine hydrochloride and 7.5 m9 selec3ilille hydroc~lloride.
10 kg of amantadine hydrochloride was mixed intensively with 0.75 kg of selegiline hydrochloride using a suitable mixing device~ 'l'lle mixture was then granulated in a known manner in a fluidized bed-spray granulator with a solution of 0.25 kg of gelatin in 2.25 kg water. To the granulated mixture, 0.85 kg of corn starcll, 0.1 kg of magnesium stearate and 0.05 kg of highly dispersed silicon dioxide were admixed. The product was poured ln si~,e 2 hard gelatin capsules, a 120 mg portion ln each capsule. One capsule contains 100 mg of amantadine hydrochloride and 7.5 mg of selegiline llydrochloride.
Claims (22)
1. A product for controlling the Parkinson's disease, depressions, narcolepsy and the organocerebral psychosyndrome containing as active substances amantadine, and amount of amantadine per 1 part by weight of selegiline is 0.4 to 800 parts by weight, and selegiline or a salt of these compounds with biocompatible acids, the product constituting a combined preparation for simultaneous or separate use of the active substances.
2. A product according to claim 1 in dosage unit form, each dosage unit containing 20 to 800 mg of amantadine and 1 to 50 mg of selegiline.
3. A product according to claim 2, which contains 50 to 600 mg of amantadine.
4. A product according to claim 2 or 3, which contains 3 to 40 mg of selegiline.
5. A product. according to claim 1, 2 or 3, which con-tains the salts of the compounds.
6. A product according to claim 1, 2 or 3, which con-tains the hydrochlorides or citrates of the compounds.
7. A product according to claim 1, containing at least 20 mg of amantadine and at least 1 mg of selegiline.
8. A product according to claim 1, in daily dosage form comprising 20 to 4000 mg of amantadine and 1 to 250 mg of selegiline.
9. A product according to claim 1, in daily dosage form comprising 50 to 3000 mg of amantadine and 3 to 200 mg of selegiline.
10. A product according to claim 1, in daily dosage form comprising 100 to 2000 mg of amantadine and 4 to 150 mg of selegiline.
11. A product in dosage unit form containing 100 to 400 mg of amantadine and 4 to 30 mg of selegiline, said dose being administered 1 to 3 times daily.
12. A product according to claim 1 in which the amount of amantadine per 1 part by weight of selegil1lle is 1. 2 to 200 parts by weight.
13. A product according to claim 1, in which the amount of amantadine per 1 part by weight of selegiline is 3.3 to 100 parts by weight.
14. A product according to claim 1 in dosage unit form, each dosage unit containing 100 to 400 mg of amantadine and 5 to
15 mg of selegiline.
15. A product according to claim 1, 2 or 3, containing a pharmaceutical carrier.
15. A product according to claim 1, 2 or 3, containing a pharmaceutical carrier.
16. A product according to claim 1, 2 or 3, in which the active ingredients are in admixture.
17. A product according to claim 1, 2 or 3, in which each of the active substances is in a separate formulation.
18. A process for manufacturing a product for control-ling the Parkinson's disease, depressions, narcolepsy and the organocerebral psychosyndrome in which 1 part by weight of
19 selegiline and 0.4 to 800 parts by weight of amantadine, together with conventional carriers and/or diluents or inactive ingre-dients are processed in to products containing in one dosage unit
20 to 800 mg of amantadine and 1 to 50 mg of selegiline, the active substances may also be present in the form of their phar-maceutically acceptable salts.
19. A process for manufacturing a product for control-ling the Parkinson's disease, depressions, narcolespy and the organocerebral psychosyndrome in which 1 part by weight of selegiline and 0.4-800 parts by weight of amantadine or their salts with biocompatible acids is mixed or homogenized together with conventional carriers and/or diluents or inactive ingre-dients at the temperatures of 20-80°C, and the mixture thus obtained, in order to produce preparations containing 20-800 mg of amantadine and 1-50 mg of selegiline in one dosage unit, is poured out into hollow cells of corresponding size or filled into capsules of corresponding size or tabletted, or granulated and then, upon addition of further conventional inactive ingredients, filled into capsules or tabletted or, using blocompatible sol-vents, processed into solutions or dispersions respectively, wherein such liquid preparations contain 2-10 percent by weight of amantadine and 0.1-1 percent by weight of selegiline.
20. A process for manufacturing a product for control-ling the Parkinson 1 9 disease, depressions, narcolepsy and the organocerebral psychosyndrome in which 1 part by weight of selegiline and 0.4-800 parts by weight of amantadine or their salts of biocompatible acids is mixed, with at least one of the following inactive ingredients, starch, cellulose, calcium hydro-gen phosphate and modified starch, subsequently granulated with an aqueous solution of gelatin or starch or an aqueous vinylpyrrolidone-vinyl acetate copolymer, and the resulting gra-nulate is mixed with magnesium stearate and highly dispersed sil-icon dioxide as well as starch and/or cellulose and then tablet-ted or encapsulated.
19. A process for manufacturing a product for control-ling the Parkinson's disease, depressions, narcolespy and the organocerebral psychosyndrome in which 1 part by weight of selegiline and 0.4-800 parts by weight of amantadine or their salts with biocompatible acids is mixed or homogenized together with conventional carriers and/or diluents or inactive ingre-dients at the temperatures of 20-80°C, and the mixture thus obtained, in order to produce preparations containing 20-800 mg of amantadine and 1-50 mg of selegiline in one dosage unit, is poured out into hollow cells of corresponding size or filled into capsules of corresponding size or tabletted, or granulated and then, upon addition of further conventional inactive ingredients, filled into capsules or tabletted or, using blocompatible sol-vents, processed into solutions or dispersions respectively, wherein such liquid preparations contain 2-10 percent by weight of amantadine and 0.1-1 percent by weight of selegiline.
20. A process for manufacturing a product for control-ling the Parkinson 1 9 disease, depressions, narcolepsy and the organocerebral psychosyndrome in which 1 part by weight of selegiline and 0.4-800 parts by weight of amantadine or their salts of biocompatible acids is mixed, with at least one of the following inactive ingredients, starch, cellulose, calcium hydro-gen phosphate and modified starch, subsequently granulated with an aqueous solution of gelatin or starch or an aqueous vinylpyrrolidone-vinyl acetate copolymer, and the resulting gra-nulate is mixed with magnesium stearate and highly dispersed sil-icon dioxide as well as starch and/or cellulose and then tablet-ted or encapsulated.
21. A process for manufacturing a product for control-ling the Parkinson's disease, depressions, narcolepsy and the organocerebral psychosyndrome in which 1 part by weight of selegiline and 0.4-800 parts by weight of amantadine or their salts of biocompatible acids, upon the admixture of soybean lecithin is suspended and homogenized in molten hard fat at tem-peratures between 33 and 37°C and the mixture is then poured into hollow cells.
22. A process for manufacturing a product for control-ling the Parkinson's disease, depressions, narcolepsy and the organocerebral psychosyndrome, for combined use with amantadine, in which 1 to so mg of selegiline, which may also be present in pharmaceutically acceptable salt form is mixed or homogenized together with conventional carriers and/or diluents or inactive lngredients at temperatures of 20-80°C, the mixture thus obtained, in order to produce preparations containing 1-50 mg selegiline in the dosage unit, is poured into hollow cells of corresponding size or into capsules of corresponding size or tabletted or granulated and subsequently, upon admixture of fur-ther conventional inactive ingredients, filled into capsules or tabletted or converted into solutions or disperslons respectively using biocompatible solvents, wherein the concentration of selegiline in such liquid preparations is 0.1-1 percent by weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3612702 | 1986-04-16 | ||
| DEP3612702.7 | 1986-04-16 |
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| CA1298200C true CA1298200C (en) | 1992-03-31 |
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| CA000534793A Expired - Lifetime CA1298200C (en) | 1986-04-16 | 1987-04-15 | Process for producing a synergistic combination of amantadine and selegiline |
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| US (1) | US4812481A (en) |
| EP (1) | EP0241809B1 (en) |
| JP (1) | JPS62249923A (en) |
| AT (1) | ATE55245T1 (en) |
| AU (1) | AU598533B2 (en) |
| CA (1) | CA1298200C (en) |
| DD (1) | DD259352A5 (en) |
| DE (1) | DE3764144D1 (en) |
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| US4861800A (en) * | 1987-08-18 | 1989-08-29 | Buyske Donald A | Method for administering the drug deprenyl so as to minimize the danger of side effects |
| GB8807504D0 (en) * | 1988-03-29 | 1988-05-05 | Sandoz Ltd | Improvements in/relating to organic compounds |
| HU208484B (en) * | 1988-08-17 | 1993-11-29 | Chinoin Gyogyszer Es Vegyeszet | Process for producing pharmaceutical composition containing acid additional salt of selegilin as active component for treating schisofrenia |
| CA2085585A1 (en) * | 1990-06-25 | 1991-12-26 | George Torosian | Amantadine hydrochloride suspension with enhanced dissolution characteristics for use in soft gelatin capsules |
| US5175002A (en) * | 1991-10-02 | 1992-12-29 | Du Pont Merck Pharmaceutical Company | Amantadine hydrochloride syspension with enhanced dissolution characteristics for use in soft gelatin capsules |
| ATE238417T1 (en) | 1991-11-04 | 2003-05-15 | Inst Genetics Llc | RECOMBINANT BONE MORPHOGENETIC PROTEIN HETERODIMERS, COMPOSITIONS AND METHODS OF USE |
| HUT63579A (en) * | 1991-12-20 | 1993-09-28 | Chinoin Gyogyszer Es Vegyeszet | Process for producing double-phase pharmaceutical compositions suitable for treating diseases occurring during neurodegenerative processes |
| US5817336A (en) * | 1993-04-02 | 1998-10-06 | Orion-Yhtyma Oy | Composition containing selegiline |
| US5484608A (en) * | 1994-03-28 | 1996-01-16 | Pharmavene, Inc. | Sustained-release drug delivery system |
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| US6299901B1 (en) | 1995-01-13 | 2001-10-09 | Somerset Pharmaceuticals, Inc. | Methods and pharmaceutical compositions employing desmethylselegiline |
| US6033682A (en) * | 1995-01-13 | 2000-03-07 | Somerset Pharmaceuticals, Inc. | S(+) desmethylselegiline and its use in therapeutic methods and pharmaceutical compositions |
| DE19533772C1 (en) * | 1995-09-12 | 1998-01-02 | Hexal Ag | Tacrine / selegiline patch |
| DK0866691T4 (en) * | 1995-11-06 | 2005-06-06 | Somerset Pharmaceuticals Inc | Medications for sublingual and buccal administration of selegiline |
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| US7619007B2 (en) * | 2004-11-23 | 2009-11-17 | Adamas Pharmaceuticals, Inc. | Method and composition for administering an NMDA receptor antagonist to a subject |
| CA2588296A1 (en) | 2004-11-24 | 2006-06-01 | Neuromolecular Pharmaceuticals, Inc. | Composition comprising an nmda receptor antagonist and levodopa and use thereof for treating neurological disease |
| WO2006091544A2 (en) * | 2005-02-22 | 2006-08-31 | Northwestern University | Methods and compositions for modulating calcium channels |
| ES2819303T3 (en) | 2005-04-05 | 2021-04-15 | Univ Yale | Glutamate modulating agents in the treatment of mental disorders |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE314077C (en) * | ||||
| AT314077B (en) * | 1972-01-07 | 1974-03-25 | Hurka Wilhelm | Process for the production of a new combination preparation effective against Parkinsonism |
| HU193662B (en) * | 1983-12-20 | 1987-11-30 | Chinoin Gyogyszer Es Vegyeszet | Process for producing synergetic pharmaceutical composition of antidepressive aktivity |
-
1987
- 1987-04-01 DE DE8787104818T patent/DE3764144D1/en not_active Expired - Lifetime
- 1987-04-01 AT AT87104818T patent/ATE55245T1/en not_active IP Right Cessation
- 1987-04-01 EP EP87104818A patent/EP0241809B1/en not_active Expired - Lifetime
- 1987-04-01 ES ES198787104818T patent/ES2029805T3/en not_active Expired - Lifetime
- 1987-04-13 JP JP62088986A patent/JPS62249923A/en active Pending
- 1987-04-14 NO NO871581A patent/NO871581L/en unknown
- 1987-04-14 ZA ZA872690A patent/ZA872690B/en unknown
- 1987-04-14 DD DD87301815A patent/DD259352A5/en unknown
- 1987-04-14 IE IE97387A patent/IE60245B1/en not_active IP Right Cessation
- 1987-04-14 PL PL1987265152A patent/PL265152A1/en unknown
- 1987-04-15 CA CA000534793A patent/CA1298200C/en not_active Expired - Lifetime
- 1987-04-15 FI FI871668A patent/FI871668A/en not_active Application Discontinuation
- 1987-04-15 AU AU71541/87A patent/AU598533B2/en not_active Ceased
- 1987-04-15 PT PT84684A patent/PT84684B/en not_active IP Right Cessation
- 1987-04-15 US US07/038,566 patent/US4812481A/en not_active Expired - Fee Related
- 1987-04-15 DK DK197787A patent/DK168514B1/en not_active IP Right Cessation
- 1987-04-16 IL IL82216A patent/IL82216A0/en unknown
- 1987-04-16 HU HU871687A patent/HU197840B/en not_active IP Right Cessation
-
1990
- 1990-08-09 GR GR90400531T patent/GR3000707T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU598533B2 (en) | 1990-06-28 |
| ES2029805T3 (en) | 1992-10-01 |
| FI871668A (en) | 1987-10-17 |
| IE870973L (en) | 1987-10-16 |
| ATE55245T1 (en) | 1990-08-15 |
| IE60245B1 (en) | 1994-06-15 |
| NO871581D0 (en) | 1987-04-14 |
| NO871581L (en) | 1987-10-19 |
| AU7154187A (en) | 1987-10-29 |
| IL82216A0 (en) | 1987-10-30 |
| HU197840B (en) | 1989-06-28 |
| PT84684B (en) | 1989-12-29 |
| FI871668A0 (en) | 1987-04-15 |
| JPS62249923A (en) | 1987-10-30 |
| HUT43789A (en) | 1987-12-28 |
| DE3764144D1 (en) | 1990-09-13 |
| DK197787D0 (en) | 1987-04-15 |
| PT84684A (en) | 1987-05-01 |
| DK168514B1 (en) | 1994-04-11 |
| GR3000707T3 (en) | 1991-10-10 |
| DD259352A5 (en) | 1988-08-24 |
| ZA872690B (en) | 1988-03-30 |
| PL265152A1 (en) | 1988-07-07 |
| EP0241809B1 (en) | 1990-08-08 |
| US4812481A (en) | 1989-03-14 |
| EP0241809A1 (en) | 1987-10-21 |
| DK197787A (en) | 1987-10-17 |
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