NutriStack
Levofloxacin and Zinc Picolinate, timing-sensitive.
Zinc picolinate can bind fluoroquinolone antibiotics in the gut and reduce absorption. Levofloxacin exposure can fall when taken with multivalent cations, which may lead to antibiotic failure or resistance, especially for serious infections. This is preventable by separating doses.
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At a glance
- Substances
- Levofloxacin and Zinc Picolinate
- Pair type
- Timing Sensitive
- Evidence (highest tier)
- Moderate
- Source citations
- 3 sources
- Stack Score effect
- −5 to your Stack Score (per scored timing-sensitive row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Timing Sensitive · Moderate evidence
Timing Sensitive
What is happening. Zinc picolinate can bind fluoroquinolone antibiotics in the gut and reduce absorption. Levofloxacin exposure can fall when taken with multivalent cations, which may lead to antibiotic failure or resistance, especially for serious infections. This is preventable by separating doses.
Mechanism. Zinc is a divalent cation that can chelate fluoroquinolones in the gastrointestinal tract, forming poorly absorbed complexes. Lower levofloxacin Cmax and AUC can reduce the AUC/MIC exposure needed for bacterial killing.
Recommendation. Take levofloxacin at least 2 hours before or 6 hours after zinc picolinate. Do not take zinc at the same time as the antibiotic, even in a multivitamin. If you accidentally took them together, ask your prescriber or pharmacist whether the levofloxacin dose needs to be retimed.
Minimum separation. 360
Sources (3)
- Fish DN, Chow AT. The clinical pharmacokinetics of levofloxacin. Clin Pharmacokinet. 1997;32(2):101-119. PMID 9068926
- Pai MP, Allen SE, Amsden GW. Altered steady state pharmacokinetics of levofloxacin in adult cystic fibrosis patients receiving calcium carbonate. J Cyst Fibros. 2006;5(3):153-157. PMID 16481224
- Polk RE, Healy DP, Sahai J, Drwal L, Racht E. Effect of ferrous sulfate and multivitamins with zinc on absorption of ciprofloxacin in normal volunteers. Antimicrob Agents Chemother. 1989;33(11):1841-1844. PMID 2610494
Stack Score
How this pair moves the number.
Effect on the composite score
If both Levofloxacin 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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