Abstract: The present disclosure provides for methods of producing analgesia in a subject. In some cases, methods produce analgesia in a subject undergoing arthroscopic subacromial decompression surgery. The present disclosure also relates to improved sustained release drug delivery systems. In some cases, a composition comprises an active pharmaceutical agent; at least one of sucrose acetate isobutyrate and a polyorthoester; an organic solvent; and 2,6-dimethylaniline, wherein the 2,6-dimethylaniline is present at a level less than 500 ppm. In some cases, a composition comprises bupivacaine N-oxide at a level less than 1 wt %, based on weight of the composition. In some cases, a composition comprises metal present at a level less than 5 ppm. Dosage forms and methods are also provided.

Abstract: Described here are compositions and methods for treating side-effects of vasodilator therapy. The compositions may include both a vasodilator and a side-effect alleviating agent in a single dosage form. Alternatively, the vasodilator and side-effect alleviating agent may be formulated separately, each in its own dosage form. The compositions may be packaged as kits for use with various medical conditions.