Is Beta-Blockers (Metoprolol/Atenolol) Safe with Caffeine?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Limit caffeine intake to less than 100mg per day if taking beta-blockers for hypertension or cardiac conditions. Avoid pre-workout supplements containing caffeine. Monitor blood pressure regularly.
Why this interaction occurs
Caffeine acts as an adenosine receptor antagonist and stimulates catecholamine release, causing acute increases in heart rate and blood pressure. Beta-blockers competitively block beta-adrenergic receptors to lower blood pressure and heart rate. High caffeine doses (>300mg) can significantly counteract the antihypertensive efficacy of beta-blockers, leading to breakthrough hypertension and increased cardiovascular event risk.
Evidence
Evidence level: strong.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 24,547 reports mentioning Caffeine. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Caffeine + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Beta-Blockers (Metoprolol/Atenolol) interactions → · All Caffeine interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.