Carbamazepine and Doxycycline: Drug Interaction Guide
Quick answer: This combination requires caution. Carbamazepine and Doxycycline can be used together with adjustments and monitoring.
How Carbamazepine interacts with Doxycycline
Carbamazepine induces hepatic CYP3A4, accelerating doxycycline metabolism and reducing serum concentrations to potentially sub-therapeutic levels.
What you should do
Consider doxycycline 100 mg twice daily instead of once daily, or use an alternative tetracycline (minocycline) not affected by enzyme induction.
Key facts
Severity
Moderate — caution required
Mechanism
Carbamazepine induces hepatic CYP3A4, accelerating doxycycline metabolism and reducing serum concentrations to potential...
Action
Consider doxycycline 100 mg twice daily instead of once daily, or use an alternative tetracycline (minocycline) not affe...
Frequently asked questions
Can I take Carbamazepine and Doxycycline together?
With caution. Consider doxycycline 100 mg twice daily instead of once daily, or use an alternative tetracycline (minocycline) not affected by enzyme induction.
What is the severity of this interaction?
The interaction between Carbamazepine and Doxycycline is classified as Moderate — caution required. Carbamazepine induces hepatic CYP3A4, accelerating doxycycline metabolism and reducing serum concentrations to potentially sub-therapeutic levels.
What should I do if I'm prescribed both?
Consider doxycycline 100 mg twice daily instead of once daily, or use an alternative tetracycline (minocycline) not affected by enzyme induction. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.