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Does Amoxicillin Oral Susp Interact with Tetracycline?

Amoxicillin Oral Susp and Tetracycline have a unknown drug interaction according to U.S. FDA drug labeling data. May interfere with the bactericidal effects of penicillin in vitro; clinical significance is not well documented. The mechanism involves interference with bactericidal effects. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity: Unknown
Management: Consult your pharmacist
Data Source: U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Amoxicillin Oral Susp and Tetracycline occurs because interference with bactericidal effects. Clinically, this means may interfere with the bactericidal effects of penicillin in vitro; clinical significance is not well documented.

What To Tell Your Doctor or Pharmacist

If you are taking Amoxicillin Oral Susp and your doctor is considering prescribing Tetracycline (or vice versa), make sure to:

Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
Ask whether the benefits of combining these medications outweigh the risks for your specific situation
Ask what symptoms to watch for that would indicate the interaction is causing problems
Never stop or change either medication without first consulting your healthcare provider

💊 Amoxicillin Oral Susp(Amoxil)+💊 Tetracycline(Viabecline)

Severity & Interaction Details

ℹ️

unknown

Interaction documented — severity unclassified

The FDA label notes an interaction but the severity is not classified in our dataset.

Severity scale

MinorContra

On record

Yes

Drug A class

—

Drug B class

—

Source

NLP:amoxicillin oral susp

What this means in plain English

May interfere with the bactericidal effects of penicillin in vitro; clinical significance is not well documented.

About Amoxicillin Oral Susp and Tetracycline

You may recognize them by the brand names Amoxil and Viabecline. Amoxicillin Oral Susp is taken by mouth.

What the FDA label says

"Interference with bactericidal effects"

📖 Source: NLP:amoxicillin oral susp

Recent research & FDA safety updates

Live

Auto-aggregated from PubMed E-utilities and FDA safety data.

PubMed

Comprehensive whole-genome sequencing reveals the resistome, virulome, and mobile genetic architecture of multidrug-resistant Acinetobacter baumannii.about Tetracycline · 2026-05

PubMed

Resistance of gram-negative and gram-positive pathogens to omadacycline: a systematic review.about Tetracycline · 2026-05

PubMed

Clinical, Pathological, and Antimicrobial Resistance Features of Staphylococcus aureus Infections in Rabbits Raised Under Extensive Traditional Systems in Western Romania.about Tetracycline · 2026-05

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.