What kind of interaction is it?

Timing-sensitive: the two substances can be taken on the same day but should be separated by a minimum time window.

Is this interaction backed by published research?

Yes. NutriStack lists 2 citation rows for the Ampicillin + Zinc pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Prescription·timing-sensitive·Insufficient evidence

Ampicillin + Zinc

Q: Can I take Ampicillin and Zinc together?

Yes, if you separate them in time. Ampicillin and Zinc have a documented timing-sensitive interaction. Although chelation interactions with penicillins are far less pronounced than with tetracyclines or fluoroquinolones, divalent cations such as zinc can form complexes with some beta-lactam antibiotics and may modestly reduce absorption when taken together. The clinical impact for ampicillin is generally small.

Q: How does this affect a NutriStack Stack Score?

-5 to your Stack Score per scored timing-sensitive row.

Timing Sensitive Insufficient evidence

Although chelation interactions with penicillins are far less pronounced than with tetracyclines or fluoroquinolones, divalent cations such as zinc can form complexes with some beta-lactam antibiotics and may modestly reduce absorption when taken together. The clinical impact for ampicillin is generally small.

Supplement × Prescription

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Ampicillin and Zinc

Pair type

Timing Sensitive

Evidence

Insufficient

Source citations

Scope

Supplement × Prescription

Last verified

June 4, 2026

Timing SensitiveInsufficient evidence

What is happening. Although chelation interactions with penicillins are far less pronounced than with tetracyclines or fluoroquinolones, divalent cations such as zinc can form complexes with some beta-lactam antibiotics and may modestly reduce absorption when taken together. The clinical impact for ampicillin is generally small.

Mechanism. Divalent zinc cations can chelate beta-lactam antibiotics in the gut lumen, potentially forming poorly absorbed complexes and lowering antibiotic bioavailability.

Recommendation. To avoid any reduction in antibiotic absorption, take zinc supplements at least 2 hours before or after ampicillin. Ampicillin is also best taken on an empty stomach (1 hour before or 2 hours after food) for optimal absorption.

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 Ampicillin 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

1Lomaestro BM, Bailie GR. Absorption interactions with fluoroquinolones. Drug Saf. 1995.Needs sourceNo link
2Neuvonen PJ. Interactions with the absorption of tetracyclines. Drugs. 1976.Needs sourceNo link

Check your full routine

One pair was the worked example.

Drop your supplements and prescriptions into NutriStack and it runs every pair at once: every interaction, synergy, timing rule, and contraindication, each linked to its primary source.

Open the interaction checker → Browse the research index