NutriStack
Amitriptyline and Sertraline, a caution.
Combining an SSRI with a tricyclic antidepressant increases the risk of serotonin syndrome and may elevate TCA blood levels due to CYP2D6 inhibition, increasing the risk of TCA toxicity including cardiac arrhythmias.
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
- Amitriptyline and Sertraline
- Pair type
- Caution
- Evidence (highest tier)
- Strong
- 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 · Strong evidence
Caution
What is happening. Combining an SSRI with a tricyclic antidepressant increases the risk of serotonin syndrome and may elevate TCA blood levels due to CYP2D6 inhibition, increasing the risk of TCA toxicity including cardiac arrhythmias.
Mechanism. Both SSRIs and TCAs increase serotonergic tone. SSRIs also inhibit CYP2D6-mediated TCA metabolism, raising TCA plasma levels and risk of cardiac toxicity.
Recommendation. Generally avoid this combination. If clinically necessary, use reduced TCA doses with serum TCA level monitoring and ECG surveillance.
Sources (1)
Stack Score
How this pair moves the number.
Effect on the composite score
If both Amitriptyline and Sertraline 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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