NOVEL INJECTABLE DEPOT COMPOSITIONS AND PROCESS OF PREPARATION OF SUCH COMPOSITIONS

摘要

Novel injectable compositions are provided comprising an active agent which is tarnsulosin or letrozole or its pharmaceutically acceptable salts, derivatives, isomers, polymorphs, solvates, hydrates, analogues, enantiomers, tautomeric forms or mixtures thereof and one or more pharmaceutically acceptable excipient(s) wherein the compositions are preferably formulated as biodegradable microparticles or nanoparticles which can optionally be reconstituted with an aqueous, hydro-alcoholic or oily liquid vehicle prior to administration. The novel injectable compositions of the present invention preferably form a depot upon administration in vivo and are in the form of an in situ gelling composition or an implant composition which provides a prolonged release of tamsulosin or letrozole for extended periods of time. Also described are process for preparation of such novel compositions and method of using them.