The short answer
Review melatonin before adding it to desipramine. Desipramine can change the body’s own melatonin production, but that does not establish an interaction with a melatonin supplement.
What this answer covers
Oral melatonin supplements; endogenous secretion and prolonged-release imipramine co-use studies are different evidence.
- Supplement or preparation
- Melatonin
- Medication ingredient
- desipramine
The direct medicine study measured natural secretion
After desipramine, evening melatonin production rose earlier. Researchers attributed this to production rather than blocked breakdown. Participants were not testing a melatonin supplement combination.
Another antidepressant has different evidence
Circadin information describes more tranquility and difficulty performing tasks with imipramine, without a clinically significant pharmacokinetic change. Imipramine is a different medicine, so that is indirect context.
Match the actual formulation
Tell the pharmacist the melatonin amount and whether it is immediate- or prolonged-release. Neither study establishes a protective spacing interval with desipramine.
Watch for impaired alertness
Desipramine can affect alertness and coordination. Avoid driving if affected and contact the prescriber if added sleepiness, confusion or unsteadiness appears after a new product. Severe confusion, fainting or inability to wake needs urgent assessment.
Evidence and practical considerations
Side effects & toxicity
Exact-pair additive sedation remains insufficiently established; endogenous hormone and other-drug findings support careful interpretation.
- Exact scope
- Oral melatonin supplements; endogenous secretion and prolonged-release imipramine co-use studies are different evidence. with Exact oral desipramine hydrochloride tablets. RxNorm IN 3247/PIN 203174 hydrochloride. Mainly norepinephrine reuptake activity does not erase the exact label’s serotonin warning. CYP2D6 inhibition can affect concentrations; not assumed identical to CYP3A substrates.
- Medication form and route
- oral
- Timing or duration
- Source-specific single-dose, repeated-dose and observational exposures distinguished.
What remains uncertain
- No exact desipramine plus melatonin supplement clinical study identified; no validated timing or dose rule.
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 desipramine.
Exact label warns about serotonin syndrome with tryptophan and St John’s wort, CYP2D6 inhibition, impaired alertness and cardiovascular/anticholinergic effects.
How this applies: RxNorm IN 3247/PIN 203174 hydrochloride. Mainly norepinephrine reuptake activity does not erase the exact label’s serotonin warning. CYP2D6 inhibition can affect concentrations; not assumed identical to CYP3A substrates.
No universal supplement interval, event rate or preparation equivalence established. Original label distinguishes warnings from measured pair-specific results.
Source 2: original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: People receiving acute desipramine or placebo.
Earlier increased evening melatonin production; authors found no evidence that reduced hepatic breakdown explained the rise.
How this applies: Only the named drug, preparation, route and measured endpoints apply.
Not a melatonin-supplement co-use experiment or a clinical sedation assessment.
Source 3: official product label
medicines.org.uk · Source check Sep 10, 2026
Population: Participants in original interaction studies summarized by label.
No clinically significant pharmacokinetic interaction; greater tranquility and difficulty performing tasks compared with imipramine alone.
How this applies: Exact imipramine co-use if this is the requested drug; otherwise indirect other-drug evidence.
Label summary lacks full trial detail. Imipramine findings cannot establish desipramine, nortriptyline or trazodone interaction magnitude.
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: 7bedc56125c5a884
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.