Metered dose inhalers. Doctors don't teach flotation method.
Keeley
D
D
D000318:Adrenergic beta-Agonists / Q000009:adverse effects*; D001249:Asthma / Q000188:drug therapy / Q000401:mortality*; D006801:Humans; D009330:Nebulizers and Vaporizers
D000318:Adrenergic beta-Agonists