The short answer
Discuss SAMe with the prescriber before combining it with amoxapine. A possible interaction warrants review, but neither serotonin syndrome nor a change in amoxapine absorption or benefit is established.
What this answer covers
Oral S-adenosyl-L-methionine, distinct from injected SAMe and ordinary methionine in food.
- Supplement or preparation
- S-Adenosylmethionine
- Medication ingredient
- amoxapine
Official guidance describes a possible concern
NCCIH notes possible interactions between SAMe and serotonin-increasing medicines and calls for special review in bipolar disorder. This does not document an amoxapine event.
Augmentation studies are not all-drug evidence
A controlled SRI augmentation study reported better depression outcomes with SAMe and similar adverse-event discontinuation. Amoxapine coexposure was not established.
Absorption is a separate unanswered question
The trial does not measure amoxapine levels or show that SAMe makes it stronger or weaker. Do not alter the prescription based on a general augmentation result.
Bring the proposed regimen for review
Discuss the exact oral product, amount, mood history and other medicines. Do not use a spacing rule as assurance of safety or substitute SAMe for amoxapine on your own.
Evidence and practical considerations
Side effects & toxicity
Both exact-pair serotonin toxicity and altered effectiveness/absorption claims remain insufficiently established.
- Exact scope
- Oral S-adenosyl-L-methionine, distinct from injected SAMe and ordinary methionine in food. with Exact oral amoxapine tablets. RxNorm IN722, exact oral amoxapine tablets. Active hydroxy metabolites and dopamine-receptor effects do not make it identical to other antidepressants or antipsychotics.
- Medication form and route
- oral
- Timing or duration
- Source-specific single-dose, repeated-dose and observational exposures distinguished.
What remains uncertain
- General supplement guidance and trials with other antidepressants do not establish amoxapine-specific outcomes.
Factors that may matter: preparation and plant part; clinical indication; dose; other medicines; baseline alertness.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People prescribed oral amoxapine.
Label describes a mild sedative component, dopamine-blocking and neuroleptic malignant syndrome concerns, and active metabolites. It does not explicitly name serotonin syndrome or the requested supplements.
How this applies: RxNorm IN722, exact oral amoxapine tablets. Active hydroxy metabolites and dopamine-receptor effects do not make it identical to other antidepressants or antipsychotics.
No universal supplement interval, event rate or preparation equivalence established.
Source 2: official supplement guidance
nccih.nih.gov · Source check Sep 10, 2026
Population: People considering SAMe.
Possible interaction with serotonin-increasing medicines and supplements; bipolar disorder and limited long-term safety warrant review.
How this applies: Supplement guidance supports review; exact amoxapine clinical interaction remains unestablished.
General product precaution, not a quantified amoxapine-specific interaction or clinical case.
Source 3: original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: 73 serotonin reuptake inhibitor nonresponders with major depression.
Response and remission favored SAMe; discontinuation due to adverse events was not significantly different.
How this applies: Only the named drug, preparation, route and measured endpoints apply.
Mixed-SRI augmentation trial does not establish amoxapine coexposure or drug-specific safety. Original publisher web excerpts were inspected; raw download failed.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Current exact available claims adjudicated using original captures and explicit identity and comparator limits. | |
| Research summary published |
Article revision: 2474ca27d7872c30
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.