Benzphetamine and Naltrexone and bupropion interaction
Benzphetamine and Naltrexone and bupropion: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Naltrexone and bupropion (Contrave Extended-Release) label · effective 2025-11-10
…tumor or infection, or metabolic disorders (e.g., hypoglycemia, hyponatremia, severe hepatic impairment, and hypoxia) excessive use of alcohol or sedatives, addiction to cocaine or stimulants, or withdrawal from sedatives patients with diabetes treated with insulin and/or oral diabetic medications (sulfonylureas and meglitinides) that may cause hypoglycemia concomitant…
Drug-Laboratory Test Interactions: CONTRAVE can cause false- positive urine test results for amphetamines.
Drug-Laboratory Test Interactions False-positive urine immunoassay screening tests for amphetamines have been reported in patients taking bupropion.
Confirmatory tests, such as gas chromatography/mass spectrometry, will distinguish bupropion from amphetamines.
From the Benzphetamine (Benzphetamine Hydrochloride) label · effective 2026-06-18
Amphetamines may enhance the effects of tricyclic antidepressants.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.