Classification of Drugs used to treat cough

1. Anti-tussives
Codeine, Hydrocodone, Hydromorphone, Benzonate, Dextromethorphan HCl, Carbetapentane

2. Expectorant:
Guaifenesin, Guaiacol, Terpene hydrate, Creosate

3. Mucolytic agents:
Acetylcysteine, Bromohexine, Proteolytic enzymes such as trypsin, Ambroxol