The Food and Drug Administration (FDA, Agency, or we) has determined that ISUPREL (isoproterenol hydrochloride) injection, 0.2 milligrams (mg)/milliliter (mL), was not withdrawn from sale for reasons of safety or effectiveness. This determination will allow FDA to approve abbreviated new drug applications (ANDAs) for ISUPREL (isoproterenol hydrochloride) injection, 0.2 mg/mL, if all other legal and regulatory requirements are met.