NutriStack
Escitalopram and L-Tryptophan, a caution.
L-Tryptophan increases serotonin synthesis as its biosynthetic precursor. Combined with escitalopram's selective serotonin reuptake inhibition, the resulting increase in both serotonin production and synaptic retention can trigger serotonin syndrome.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Escitalopram and L-Tryptophan
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 1 source
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. L-Tryptophan increases serotonin synthesis as its biosynthetic precursor. Combined with escitalopram's selective serotonin reuptake inhibition, the resulting increase in both serotonin production and synaptic retention can trigger serotonin syndrome.
Mechanism. L-Tryptophan increases serotonin synthesis by providing additional substrate for tryptophan hydroxylase. Escitalopram's potent and selective SERT inhibition prevents clearance of the excess serotonin from the synaptic cleft, creating risk of serotonergic toxicity.
Recommendation. Avoid supplemental L-tryptophan while taking escitalopram. If you wish to support mood through diet, discuss safe options with your prescriber.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Escitalopram and L-Tryptophan are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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