NutriStack
Taurine and Verapamil, a caution.
Taurine lowers systolic and diastolic blood pressure by about 3-4 mmHg in meta-analysis and has direct heart-rate-lowering effects. Combined with verapamil's strong rate and AV-node suppression, taurine can push heart rate or blood pressure too low, especially in older adults or those on additional rate-slowing drugs.
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At a glance
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- 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. Taurine lowers systolic and diastolic blood pressure by about 3-4 mmHg in meta-analysis and has direct heart-rate-lowering effects. Combined with verapamil's strong rate and AV-node suppression, taurine can push heart rate or blood pressure too low, especially in older adults or those on additional rate-slowing drugs.
Mechanism. Taurine modulates cardiomyocyte calcium handling, blunts sympathetic outflow, and increases NO availability. These effects overlap with verapamil's L-type calcium channel blockade and AV-nodal suppression.
Recommendation. If you take verapamil, taurine doses up to 1.5-3 g/day are usually tolerable, but check your blood pressure and resting heart rate when you start. Reduce or stop taurine if your HR drops below 50 bpm or you develop new dizziness or fatigue.
Sources (2)
- Tzang CC, Lin WC, Lin LH, et al. Insights into the cardiovascular benefits of taurine: a systematic review and meta-analysis. Nutr J. 2024;23(1):93. PMID 39148075
- Mills TA, Kawji MM, Cataldo VD, et al. Profound sinus bradycardia due to diltiazem, verapamil, and/or beta-adrenergic blocking drugs. J La State Med Soc. 2004;156(6):327-31. PMID 15688675
Stack Score
How this pair moves the number.
Effect on the composite score
If both Taurine and Verapamil 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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