Posicor's removal from the market
Posicor's removal from the market, less than a year after itwas approved, shows how hard it is to predict drug interactions.
Posicor inhibits cytochrome P450 enzymes that are important formetabolizing many other drugs. This can allow other drugs to buildup to toxic levels...or prevent the formation of active metabolites.
Posicor (mibefradil) can interact with more than 25 drugsincluding other calcium blockers...beta-blockers...erythromycin...lovastatin...digoxin...and quinidine.