<unk>  is an opioid narcotic analgesic that is FDA approved for the treatment of moderate to moderately severe pain.   Common adverse reactions include lightheadedness, dizziness, sedation, nausea ,vomiting, rash, pruritus, constipation, drowsiness,mental clouding, lethargy, impairment of mental and physical performance, anxiety, fear, dysphoria.
Hydrocodone bitartrate and acetaminophen
Acetaminophen and Hydrocodone
Acetaminophen and Oxycodone
Methenamine and sodium salicylate
Acetaminophen, aspirin and salicylamide
Isometheptene, caffeine and acetaminophen
Ergotamine and caffeine 
Oxycodone/Acetaminophen