Hydrocodone is a prescription opioid pain medication used to treat moderate to severe pain when other treatments are not effective. It works by acting on opioid receptors in the brain to reduce pain signals and improve comfort during recovery. Because hydrocodone carries risks such as drowsiness, constipation, slowed breathing, tolerance, and dependence, it is classified in the United States as a Schedule II controlled substance and requires a valid prescription. Legitimate online pharmacies may offer overnight delivery only after prescription verification, secure checkout, and pharmacist review. Offers claiming no prescription or guaranteed delivery should be avoided for safety and legality.