As a narcotic, hydrocodone relieves pain by binding to opioid receptors in the brain and spinal cord. It can become taken by owning or even forswearing food, however should never be combined by using alcohol. It might interact by having monoamine oxidase inhibitors, when well as more doses that stimulate somnolence. These are inside FDA pregnancy category C: its effect in an unborn embryo or fetus is not clearly known & pregnant women should consult their doc prior to ingesting it. Most common side effects include dizziness, lightheadedness, nausea, drowsiness, vomiting, and constipation. Occasionally less most common side results come allergic reaction, blood disorders, changes in mood, mental fogginess, anxiety, lethargy, difficulty urinating, spasm of the ureter, irregular or depressed respiration, and rash.

Hydrocodone may be habit-forming, & can lead to physical & psychological addiction. In the U.S. it is a Schedule II drug in its pure form and Schedule III in multi-ingredient forms where it is combined with non-narcotics such as Paracetamol (acetaminophen), Aspirin and homatropine methylbromide. In the UK it is listed as a Class A drug under the Misuse of Drugs Act 1971.