Ciprofloxacin and Zinc Picolinate, timing-sensitive.
Zinc, including chelated forms like zinc picolinate, binds ciprofloxacin in the gut and reduces its absorption by approximately 24 to 56 percent depending on dose. Although the magnitude is smaller than with iron or calcium, the reduction is still enough to risk treatment failure in serious infections.
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At a glance
- Substances
- Ciprofloxacin and Zinc Picolinate
- Pair type
- Timing Sensitive
- Evidence (highest tier)
- Strong
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored timing-sensitive row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Timing Sensitive · Strong evidence
Timing Sensitive
What is happening. Zinc, including chelated forms like zinc picolinate, binds ciprofloxacin in the gut and reduces its absorption by approximately 24 to 56 percent depending on dose. Although the magnitude is smaller than with iron or calcium, the reduction is still enough to risk treatment failure in serious infections.
Mechanism. Zn2+ chelates the 3-carboxyl and 4-oxo groups on the fluoroquinolone core, forming nonabsorbable complexes in the intestinal lumen.
Recommendation. Take ciprofloxacin at least 2 hours before or 6 hours after zinc picolinate. Do not take in the same dose.
Minimum separation. 360
Sources (2)
- Polk RE. Drug-drug interactions with ciprofloxacin and other fluoroquinolones. Am J Med. 1989;87(5A):76S-81S. PMID 2686430
- Wiesner A, Zagrodzki P, Gawalska A, Paśko P. Together or Apart? Revealing the Impact of Dietary Interventions on Bioavailability of Quinolones: A Systematic Review with Meta-analyses. Clin Pharmacokinet. 2024;63(6):773-818. PMID 38807006
Stack Score
How this pair moves the number.
Effect on the composite score
If both Ciprofloxacin and Zinc Picolinate are in the same stack, this pair applies −5 to your Stack Score (per scored timing-sensitive row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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