Is Caffeine Safe with ciprofloxacin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Limit or avoid caffeine-containing products (coffee, tea, energy drinks, caffeine supplements) while taking ciprofloxacin. Monitor for signs of caffeine toxicity such as restlessness, insomnia, rapid heartbeat, or tremors.
Why this interaction occurs
Ciprofloxacin inhibits CYP1A2-mediated metabolism of caffeine and its xanthine derivatives, reducing clearance and elevating caffeine serum levels with prolonged half-life, increasing the risk of xanthine toxicity.
Evidence
Evidence level: strong.
Data source
FDA Drug Label
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 86,830 reports mentioning ciprofloxacin. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the ciprofloxacin + 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 Caffeine interactions → · All ciprofloxacin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.