Vicodin 5-500 mg is a medicine that belongs to the narcotic analgesic drug class. It is used to treat moderate to severe pain in patients with trauma or patients dealing with cancer. The FDA has announced it is a Schedule III drug controlled substances medication due to its risk of overdose and misuse. If quality medications are ineffective for severe pain, doctors may prescribe Vicodin 5-500 mg. Vicodin is a combined medicine under different brand names like Hydrocodone and Acetaminophen, which sometimes stays for a long time in the human body.