Does Calcium Acetate Capsules 667 Mg Interact with Tetracycline?
Calcium Acetate Capsules 667 Mg and Tetracycline have a moderate drug interaction according to U.S. FDA drug labeling data. Calcium acetate may decrease the bioavailability of tetracyclines. Administer tetracycline one hour before or three hours after calcium acetate capsules. The mechanism involves calcium binds to drugs with anionic functions (carboxyl, hydroxyl groups). 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
- Moderate
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Calcium Acetate Capsules 667 Mg and Tetracycline occurs because calcium binds to drugs with anionic functions (carboxyl, hydroxyl groups). Clinically, this means calcium acetate may decrease the bioavailability of tetracyclines. administer tetracycline one hour before or three hours after calcium acetate capsules. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Calcium Acetate Capsules 667 Mg 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
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider