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What is Amphotericin B toxicity can be reduced by? and explain in detail?
New amphotericin B formulations: In an attempt to improve tolerability of i.v. infusion of AMB, reduce its toxicity and achieve targeted delivery, 3 new lipid formulations of AMB have been produced. (a) Amphotericin B lipid complex (ABLC): Contains 35% AMB incorporated in ribbon like paicles of dimyristoyl phospholipids. ( b ) Amphotericin B colloidal dispersion (ABCD). Disc shaped paicles containing 50% each of AMB and cholesteryl sulfate are prepared as aqueous dispersion (c) Lpi osomal amphotericin B (small unilamellar vesicles SUV): Consists of 10% AMB incorporated in uniform sized (60-80 nM) unilamellar liposomes made up of lecithin and other biodegradable phospholipids. The special features of these preparations are: * They, except ABCD, produce milder acute reaction (especially liposomal formulation) on i.v. infusion. * They can be used in patients not tolerating infusion oi conventional AMB formulation. * They have lower nephrotoxicity. * They cause minimal anaemia. * The liposomal preparation delivers AMB paicularh* to reticuloendothelial cells in liver and spleen-----especialh valuable for kala azar and in immunocompromised patients ESSENTIALS OF MEDICAL PHARMACOLOGY K.D.TRIPATHI SIXTH EDITION PAGE NO:758