Medication·Interactions & depletion·Reviewed June 9, 2026
Venlafaxine interactions.
Venlafaxine has 5 documented interactions in the NutriStack database, including 4 flagged to avoid or as a serious conflict. Prolonged use is also associated with lower Sodium. The full interaction list, depletion table, and replacement suggestions are below. None of this is a substitute for your prescriber's advice.
Venlafaxine at a glance.
A quick, data-grounded summary. The full tables are below.
Venlafaxine has 5 documented interactions in the NutriStack database, including 4 flagged to avoid or as a serious conflict. Prolonged use is also associated with lower Sodium. The full interaction list, depletion table, and replacement suggestions are below. None of this is a substitute for your prescriber's advice.
Substances that interact with venlafaxine.
Every supplement and medication in the NutriStack database with a documented interaction with this drug, highest-severity first. Open any pair for the mechanism and sources.
| Substance | Interaction | What happens |
|---|---|---|
| 5-HTP | Contraindicated | Venlafaxine is an SNRI that blocks serotonin reuptake, particularly at lower doses where its effect is predominantly serotonergic. Adding 5-HTP... details → |
| L-Tryptophan | Contraindicated | L-Tryptophan is the upstream dietary precursor for serotonin, and venlafaxine blocks serotonin reuptake. Concentrated tryptophan supplements can add... details → |
| MDMA | Contraindicated | MDMA releases large amounts of serotonin and norepinephrine through monoamine transporters, while venlafaxine blocks serotonin and norepinephrine... details → |
| St. John's Wort | Contraindicated | Combining venlafaxine with St. John's Wort creates a dangerous risk of serotonin syndrome. Multiple case reports have documented this interaction.... details → |
| SAMe | Caution | SAMe has antidepressant and monoamine-modulating activity. Venlafaxine increases serotonergic signaling, especially at lower and moderate doses, and... |
What venlafaxine can deplete.
Nutrients this medication is associated with lowering over time, with the mechanism, a suggested replacement where one applies, and the biomarker to monitor. Discuss any replacement with your prescriber first.
| Nutrient | Severity | How it happens | Replace with | Monitor |
|---|---|---|---|---|
| Sodium | Moderate | Antidepressant-associated SIADH can increase renal free-water retention and dilute serum sodium, producing hyponatremia. | – | Serum sodium |
The full venlafaxine profile.
Uses, typical dosing, side effects, and the cited evidence for this medication.
Common venlafaxine questions.
Quick answers drawn from the tables above.
What interacts with Venlafaxine?
In the NutriStack database, Venlafaxine has 5 documented interactions. The most notable include 5-HTP, L-Tryptophan, MDMA, St. John's Wort, and SAMe. Check any specific combination before taking it and confirm with your prescriber.
Which substances should I avoid with Venlafaxine?
Venlafaxine is flagged against 4 substances in the database, including 5-HTP, L-Tryptophan, MDMA, and St. John's Wort. These pairings carry a higher risk and should be reviewed with a clinician before combining.
Does Venlafaxine deplete any nutrients?
Venlafaxine is associated with lowering Sodium with prolonged use. Useful biomarkers to monitor include Serum sodium. Ask your prescriber before adding any replacement supplement.
Is it safe to take 5-HTP with Venlafaxine?
NutriStack classifies the 5-HTP and Venlafaxine pairing as contraindicated: Venlafaxine is an SNRI that blocks serotonin reuptake, particularly at lower doses where its effect is predominantly serotonergic. Adding 5-HTP increases serotonin... Do not combine 5-HTP with venlafaxine. The serotonin syndrome risk is significant. Discontinue 5-HTP before starting venlafaxine therapy. Always confirm with your prescriber.
Check your whole stack
See how venlafaxine fits your supplements.
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