Hydrocodone is a prescription medication used to relieve moderate to severe pain. It belongs to a class of drugs called opioids, which work by changing the way the brain and nervous system respond to pain. Hydrocodone is often combined with other pain relievers, such as acetaminophen or ibuprofen, to enhance its effectiveness. While hydrocodone can be very effective for pain management, it also carries a risk of addiction and dependence. Patients are advised to use it only as prescribed by their doctor and to be aware of potential side effects, which can include drowsiness, constipation, and nausea.