Doctors prescribe Norco for the treatment of moderate to severe pain, according to Drugs.com. Doctors do not typically prescribe the medication for the treatment of specific illnesses.
A combination of hydrocodone and acetaminophen, Norco is an opioid, or narcotic, pain medication, explains Drugs.com. Hydrocodone works by changing the way the brain and nervous system respond to pain, notes MedlinePlus. Acetaminophen is a mild pain reliever that increases the effects of hydrocodone, reports Drugs.com. Common side effects of Norco include drowsiness, upset stomach, constipation and headache, along with dry mouth and blurred vision. Serious side effects such as lightheadedness, confusion, shallow breathing or seizures require immediate attention from a doctor.