UTILISATION DE NOUVELLES MICROSPHERES INJECTABLES BIODEGRADABLES, PROCEDE DE PREPARATION DE CES NOUVELLES MICROSPHERES ET SUSPENSIONS INJECTABLES LES RENFERMANT

摘要

Biodegradable microspheres contain a lactic acid and glycolic acid copolymer and an anti-oestrogen or anti-progestomimetic steroid. The microspheres can be formulated with an aqueous or oily vehicle to form an injectable suspension useful as a medicament. With such a medicament the release period of active ingredient can be from about 1 to about 3 months.