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 1 citation row for the Probiotics + Tetracycline pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Prescription·timing-sensitive·Moderate evidence

Probiotics + Tetracycline

Q: Can I take Probiotics and Tetracycline together?

Yes, if you separate them in time. Probiotics and Tetracycline have a documented timing-sensitive interaction. Tetracycline is a broad-spectrum antibiotic that can kill the live bacteria in probiotic supplements taken at the same time, reducing the viability and intended benefit of the probiotic. Probiotics are commonly used to mitigate antibiotic-associated gastrointestinal upset.

Q: How does this affect a NutriStack Stack Score?

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

Timing Sensitive Moderate evidence

Tetracycline is a broad-spectrum antibiotic that can kill the live bacteria in probiotic supplements taken at the same time, reducing the viability and intended benefit of the probiotic. Probiotics are commonly used to mitigate antibiotic-associated gastrointestinal upset.

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

Probiotics and Tetracycline

Pair type

Timing Sensitive

Evidence

Moderate

Source citations

Scope

Supplement × Prescription

Last verified

June 4, 2026

Timing SensitiveModerate evidence

What is happening. Tetracycline is a broad-spectrum antibiotic that can kill the live bacteria in probiotic supplements taken at the same time, reducing the viability and intended benefit of the probiotic. Probiotics are commonly used to mitigate antibiotic-associated gastrointestinal upset.

Mechanism. Tetracycline exerts bacteriostatic activity by inhibiting bacterial protein synthesis; taken concurrently it suppresses the live probiotic organisms before they reach and colonize the gut.

Recommendation. Separate the probiotic from the antibiotic dose by at least 2 hours to preserve probiotic viability. Continuing a probiotic during and after the antibiotic course may help reduce antibiotic-associated diarrhea.

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 Probiotics and Tetracycline 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

1Hempel S, et al. Probiotics for the prevention and treatment of antibiotic-associated diarrhea: a systematic review and meta-analysis. JAMA. 2012.Needs sourceNo link

Check your full routine

One pair was the worked example.

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Open the interaction checker → Browse the research index