Quick Answer: RCRA pharmaceutical waste is medication waste that meets EPA hazardous waste criteria because it is P-listed, U-listed, or exhibits a hazardous characteristic such as ignitability, corrosivity, reactivity, or toxicity. Non-RCRA pharmaceutical waste does not meet these federal hazardous waste criteria, but it still requires proper disposal and may be subject to state-specific requirements. The classification determines how pharmaceutical waste must be stored, lab