Like other medications, naltrexone can interact with other drugs and cause dangerous side effects. Because the drug is used to treat alcohol and opioid addiction, users must avoid these substances. Prior to starting a regime with the prescription, patients should provide a list of any medications, including over-the-counter drugs and herbal remedies, being taken to the physician and pharmacist. The following drugs can adversely interact with naltrexone:
- Narcotic drugs, such as codeine and hydrocodone
- Diarrhea medications
- Cough medication
Individuals who need to undergo laboratory tests should inform doctors and laboratory personnel that they are taking this drug.