NutriStack
Metoprolol and Taurine, a caution.
Taurine modestly lowers both systolic and diastolic blood pressure (~3 mmHg each in meta-analysis) and has direct heart-rate-lowering effects. Layered on metoprolol, the combination can produce additive bradycardia or hypotension in sensitive patients, though the overall effect is usually mild.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Metoprolol and Taurine
- 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 modestly lowers both systolic and diastolic blood pressure (~3 mmHg each in meta-analysis) and has direct heart-rate-lowering effects. Layered on metoprolol, the combination can produce additive bradycardia or hypotension in sensitive patients, though the overall effect is usually mild.
Mechanism. Taurine modulates vascular tone via calcium handling and nitric oxide, blunts sympathetic outflow, and stabilizes cardiomyocyte membranes. These effects overlap with metoprolol's beta1 blockade, producing additive reductions in heart rate and blood pressure.
Recommendation. If you take metoprolol, taurine doses up to 1.5-3 g/day are usually well-tolerated, but check your blood pressure and resting heart rate when you start. Hold or reduce the dose if your HR drops below 50 bpm or you develop dizziness.
Sources (2)
- Waldron M, Patterson SD, Tallent J, Jeffries O. The Effects of Oral Taurine on Resting Blood Pressure in Humans: a Meta-Analysis. Curr Hypertens Rep. 2018;20(9):81. PMID 30006901
- 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
Stack Score
How this pair moves the number.
Effect on the composite score
If both Metoprolol and Taurine 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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