Drug interactions
Asenapine + Pefloxacin
Severity: Moderate
Asenapine and Pefloxacin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Pefloxacin inhibits CYP1A2, the main enzyme metabolizing asenapine, so asenapine exposure may increase. Higher levels could add to sedation, hypotension and QT prolongation, and pefloxacin itself can prolong the QT interval.
What this interaction means in plain words
Asenapine and Pefloxacin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Asenapine belongs to Central Nervous System; Pefloxacin belongs to Anti Bacterial.
Why it happens
Inhibition of CYP1A2-mediated asenapine metabolism, with possible additive QT prolongation.
What to do
Monitor for sedation, hypotension and QT-related symptoms, and consider an ECG in patients with cardiac risk factors. Choose an antibiotic that does not inhibit CYP1A2 or prolong QT if possible.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Asenapine and Pefloxacin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Asenapine
- Asenapine + Pimozide Contraindicated
- Asenapine + Thioridazine Contraindicated
- Asenapine + Vandetanib Contraindicated
- Adagrasib + Asenapine Major
- Alfentanil + Asenapine Major
- Alfuzosin + Asenapine Major
Other interactions of Pefloxacin
- Pefloxacin + Tizanidine Contraindicated
- Clozapine + Pefloxacin Major
- Duloxetine + Pefloxacin Major
- Pefloxacin + Theophylline Major
- Caffeine + Pefloxacin Moderate
- Cimetidine + Pefloxacin Moderate
Frequently asked questions
Can I take Asenapine with Pefloxacin?
MediHelp rates the interaction as moderate. Asenapine and Pefloxacin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Pefloxacin inhibits CYP1A2, the main enzyme metabolizing asenapine, so asenapine exposure may increase. Higher levels could add to sedation, hypotension and QT prolongation, and pefloxacin itself can prolong the QT interval.
How serious is the interaction between Asenapine and Pefloxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for sedation, hypotension and QT-related symptoms, and consider an ECG in patients with cardiac risk factors. Choose an antibiotic that does not inhibit CYP1A2 or prolong QT if possible.
What other medicines interact with Asenapine?
MediHelp also lists interactions of Asenapine with, for example, Pimozide, Thioridazine, Vandetanib. The full list is on the Asenapine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
