Tetracycline and Minocycline Interaction
Drug interaction information between Tetracycline and Minocycline.
Tetracycline and Minocycline have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Tetracycline and Minocycline. This page displays the available source-record category and label text. The category is not an individual risk estimate or medication-combination direction.
How They Interact
Both of these medications are in the same antibiotic family and work the same way. Taking them together increases the risk of side effects without helping to fight the infection any better.
FDA Label Information
Drug Interactions Because tetracyclines have been shown to depress plasma prothrombin activity, patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage. Since bacteriostatic drugs may interfere with the bactericidal action of penicillin, it is advisable to avoid giving tetracycline-class drugs in conjunction with penicillin. Absorption of tetracyclines is impaired by antacids containing aluminum, calcium, or magnesium, and iron-containing preparations.
Tetracycline Also Interacts With
- Theophylline major
- Doxycycline moderate
- Doxycycline Hyclate moderate
- Zinc Sulfate minor
- Atovaquone/Proguanil minor
Frequently Asked Questions
What SPL severity band is on file for Tetracycline + Minocycline?
Compiled FDA labeling labels this pair moderate. That is a source-record field, not an individual medication-combination decision.
Which drug in this pair has the larger labeled-interaction portfolio?
Tetracycline has 12 labeled pairs on file vs Minocycline's 2. In the moderate band specifically: Tetracycline has 3 (also Doxycycline, Doxycycline Hyclate); Minocycline has 1.
What mechanism field is on file for Tetracycline and Minocycline?
Both of these medications are in the same antibiotic family and work the same way. Taking them together increases the risk of side effects without helping to fight the infection any better.
Tetracycline carries more major-labeled pairs than Minocycline
SPL source-record counts only. This page's band is moderate · classes on file: Tetracycline (Tetracycline Antibiotic); Minocycline (Tetracycline Antibiotic).
Tetracycline has 1 major-labeled pair vs Minocycline's 0. This page itself is in the moderate band, not the major band.
1 major · 3 moderate · 8 minor · 12 total
- Other moderate peers for Tetracycline
- Doxycycline
- Doxycycline Hyclate
0 major · 1 moderate · 1 minor · 2 total
Minocycline has no other moderate-band peer in this dataset besides Tetracycline.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. This registry does not provide individual medication-combination directions.
Read our methodology - how this data is sourced, computed, and verified.