Hydrocodone is a semi-synthetic opioid that works by binding to opioid receptors in the brain and spinal cord, reducing the perception of pain and often producing feelings of relaxation and euphoria.(Source) It is commonly prescribed in combination with acetaminophen under brand names such as Norco and Vicodin.(Source)

When hydrocodone is taken regularly, the brain adapts to the presence of the drug. Over time, a person may need higher or more frequent doses to get the same effect (tolerance), and their body may begin to rely on hydrocodone to function normally (physical dependence).(Source)

Hydrocodone addiction, also called hydrocodone use disorder, occurs when someone continues using the medication despite harmful consequences to their health, relationships, work, or safety.(Source) Addiction involves changes in brain circuits related to reward, motivation, and self-control, making it very difficult to stop without help.(Source)

Long-term or heavy hydrocodone use can affect the body in many ways:

• Respiratory depression: Slowed or shallow breathing, which can lead to overdose and death, especially when combined with alcohol, benzodiazepines, or other sedatives.(Source)
• Cardiovascular strain: Irregular heart rate and low blood pressure, which can be dangerous in people with underlying heart conditions.(Source)
• Gastrointestinal issues: Chronic constipation, nausea, vomiting, and abdominal pain.(Source)
• Hormonal changes: Long-term opioid use can disrupt hormones, leading to low testosterone, menstrual irregularities, and reduced fertility.(Source)
• Liver damage: Many hydrocodone products contain acetaminophen; taking high doses or misusing these medications can cause serious liver injury or failure.(Source)

In the United States, prescription opioids like hydrocodone continue to play a significant role in the opioid overdose crisis, even as prescribing has become more tightly regulated.(Source) Because of these risks, hydrocodone is generally recommended for the lowest effective dose and shortest possible duration, and it is not ideal for people with a history of opioid use disorder.(Source)