Supplement × Prescription·a caution·Emerging evidence
L-theanine may compound fatigue or reduced alertness from azelastine.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
What is happening. L-theanine may compound fatigue or reduced alertness from azelastine.
Mechanism. Potential additive calming and sedating effect.
Recommendation. Avoid combining with other calming products if drowsiness occurs.
Effect on the composite score
If both Azelastine and L-Theanine 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 at /methodology/stack-score.
Every claim on this page is cited. PMIDs link straight to PubMed.
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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
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