
Injectable, long-acting PLGA formulations: Analyzing PLGA …
As listed in Table 1, there are three different types of PLGA formulations approved by the FDA: microparticles; solid implant; and in situ forming implant (or in situ gel). In situ forming implants are based on mixing drug powder with PLGA dissolved in solvent, usually N -methyl-2-pyrrolidone (NMP), just before injection.