A medicament container, such as an injection ampule, for multiple administration of medicament suspensions the containers is filled with medicament so as to be free of gas bubbles, and includes at least one inert mixing element of suitable size whose density is different from that of the suspension....http://www.google.com.au/patents/US4850966?utm_source=gb-gplus-sharePatent US4850966 - Device for the administration of medicament suspensions
