What is Hydrocodone? Hydrocodone belongs to an opioid drug class. The primary purpose of this medicine is to treat modest to acute pain. Hydrocodone is a cough suppressant as well. It works directly on the brain’s cough centre to treat coughs. To alter how your body feels and reacts to pain, Hydrocodone acts on the brain. If you want to treat your pain with or without a cough, you...