Drugs
FDA Taking Steps on Rifampin, Rifapentine Shortages
FDA says it will not object to certain manufacturers temporarily distributing rifampin containing 1-methyl-4-nitrosopiperazine (MNP) or rifapentine containing 1-cyclopentyl-4-nitrosopiperazine (CPNP) above the acceptable intake limits to avoid shortages while the companies work to reduce or eliminate the impurities. An agency drug safety statement says