Supplement × Prescription·timing-sensitive·Insufficient evidence

Cefuroxime + Zinc

Timing Sensitive Insufficient evidence

Oral zinc, a divalent cation, can chelate cephalosporins and reduce their gastrointestinal absorption. Although best characterized for quinolone and tetracycline antibiotics, the same cation-chelation principle can theoretically lower cefuroxime axetil absorption when taken together.

From the database

What the row says.

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Substances
Pair type
Timing Sensitive
Evidence
Insufficient
Source citations
2
Scope
Supplement × Prescription
Last verified
June 4, 2026
Timing SensitiveInsufficient evidence

What is happening. Oral zinc, a divalent cation, can chelate cephalosporins and reduce their gastrointestinal absorption. Although best characterized for quinolone and tetracycline antibiotics, the same cation-chelation principle can theoretically lower cefuroxime axetil absorption when taken together.

Mechanism. Divalent zinc (Zn2+) cation chelation of the antibiotic in the gut lumen, forming poorly absorbed complexes and reducing oral bioavailability.

Recommendation. Separate zinc supplements from cefuroxime axetil by at least 2 hours. Take the antibiotic with food as prescribed and stagger zinc rather than discontinuing it.

Timing

Timing & separation.

Space the doses apart by at least this window to avoid the conflict.

Minimum separation
120
Stack Score

How it moves the number.

Effect on the composite score

If both Cefuroxime and Zinc 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 at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

2
  • 1Campbell NR, Hasinoff BB. Iron supplements: a common cause of drug interactions. Br J Clin Pharmacol. 1991.Needs sourceNo link
  • 2Lomaestro BM, Bailie GR. Absorption interactions with fluoroquinolones. Drug Saf. 1995.Needs sourceNo link

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