The short answer
A claim that tea reduces desipramine absorption has not been established in people. Review your exact tea or extract rather than relying on a fixed separation rule.
What this answer covers
Camellia sinensis, including black tea; brewed tea, isolated tannins, caffeine and concentrated extracts are distinct.
- Supplement or preparation
- Camellia sinensis
- Medication ingredient
- desipramine
Where the concern comes from
An older laboratory experiment found precipitation when tea or tannin solutions were mixed with medicines including imipramine and amitriptyline. The available abstract does not establish a desipramine-specific result.
A test tube does not measure absorption
The experiment did not measure drug concentrations or depression outcomes in people. It cannot show how much desipramine reaches the bloodstream when taken with tea.
Identify what you actually use
Black tea, green tea extract and isolated caffeine have different compositions. Bring the product and your usual amount to the pharmacist; a caffeine concern is different from proven drug binding.
Do not invent a protective interval
No validated dose gap follows from this laboratory evidence. Follow the prescription directions and ask for review if treatment seems less effective rather than increasing desipramine.
Evidence and practical considerations
Absorption & effectiveness
The cited laboratory precipitation result concerns other medicines and does not prove reduced desipramine absorption.
- Exact scope
- Camellia sinensis, including black tea; brewed tea, isolated tannins, caffeine and concentrated extracts are distinct. 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 human tea/desipramine study identified; laboratory mixtures cannot establish a two-hour interval.
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 in vitro study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Laboratory mixtures, not treated people.
Precipitation included imipramine and amitriptyline; effects differed among drugs.
How this applies: Only the named drug, preparation, route and measured endpoints apply.
No human absorption measurement, clinical treatment failure, desipramine-specific result in abstract or validated two-hour interval.
Source 3: official botanical guidance
nccih.nih.gov · Source check Sep 10, 2026
Population: People using tea beverages or extracts.
Effects can vary with product composition. No exact the requested medication absorption interaction is established by this guidance.
How this applies: Preparation-specific original evidence; no untested antidepressant or route transfer.
Caffeine and isolated catechin observations cannot be assigned to every leaf extract; decaffeinated products differ.
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: e804b1cbb39c48ff
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.