Aspirin, alcohol (
in cough compounds and pediatric elixers), morphine, codeine, dextromethorphan (“DM” in cough compounds), nonsteroidal anti-inflammatory agents, procaine, opiates (codeine, Demerol, morphine), thiamine, high molecular weight polymers (dextran).
Medicines, topical: Topical antibiotics containing polymyxin B.
Medicines sometimes used with general anesthesia: D-tubocurarine, scopolamine, decamethonium, resperpine.