Hapten-carrier conjugates capable of eliciting anti hapten antibodies in vivo by administering, in a therapeutic composition, are disclosed. Anti-hapten antibodies elicited compete with free hapten upon subsequent challenge of a vaccinated individual. Methods of preparing said conjugates and...http://www.google.com.au/patents/US5840307?utm_source=gb-gplus-sharePatent US5840307 - Hapten-carrier conjugates for use in drug-abuse therapy and methods for preparation 
