Know what? I don't think you can. You used to be able to get Primatene Mist over-the-counter, but I understand it's no longer available because of its devastating effects on the ozone layer. Just like salmeterol inhaler, which was replaced with a dry powder form where you have to physically suck the powder into your lungs, and is nowhere near as efficient as the aerosolized version that made me asthma-free until they took it off the market. I hate environmentalists. I wish they would just drop dead.