STERILE OPHTHALMIC PHARMACEUTICAL SUSPENSIONS

摘要

An aqueous suspension of a carbonic anhydrase inhibitor such as brinzolamide as well as methods of preparation thereof, are disclosed. The suspension comprises an organic polar solvent such as dimethyl sulfoxide and/or a non-aromatic non-ionic polyethoxylated surfactant such as polyethoxylated castor oil and/or or polysorbate 80. Methods include precipitating brinzolamide from the heated composition. Methods also include sonication of the suspension to reduce brinzolamide particle size.