You needed to know EPA has determined that epinephrine is not an acute Hazardous Waste but your state may not agree so you will need to check your state environmental agency, they can be more stringent. If they have accepted EPA's determination and a Epipen is not used,and is to be discarded then it can go in the sharps box. If your state is more stringent then you will need to contact them for proper disposal. If you have inhalers that have pressure or liquid in them, to discard, your state may consider them aerosol cans which can be an ignitable Hazardous Waste. If you have a stop smoking program and you have left over-unusable Nicotine Patches or the backing tab after demonstration of proper application, you have an Acute Hazardous Waste. Your district needs to talk with your state environmental agency