Clozapine and Escitalopram Interaction
Drug interaction information between Clozapine and Escitalopram.
Clozapine and Escitalopram have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Clozapine and Escitalopram. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Escitalopram slows down the process of clearing clozapine from your body. This leads to higher amounts of clozapine in your system than intended.
What To Do
Watch for increased side effects like extreme sleepiness or dizziness, and talk to your doctor about whether your clozapine dose needs to be changed.
FDA Label Information
CYP2D6 and CYP3A4 Inhibitors Concomitant treatment with VERSACLOZ and CYP2D6 or CYP3A4 inhibitors (e.g., cimetidine, escitalopram, erythromycin, paroxetine, bupropion, fluoxetine, quinidine, duloxetine, terbinafine, or sertraline) can increase clozapine levels and lead to adverse reactions [see Clinical Pharmacology (12.3) ] .
Clozapine Also Interacts With
- Cyclobenzaprine moderate
- Diphenhydramine moderate
- Fluoxetine moderate
- Sertraline minor
- Bupropion minor
Escitalopram Also Interacts With
- Citalopram major
- Linezolid major
- Pimozide major
- Aspirin moderate
- Warfarin moderate
Frequently Asked Questions
Can I take Clozapine and Escitalopram together?
This is a minor interaction. Watch for increased side effects like extreme sleepiness or dizziness, and talk to your doctor about whether your clozapine dose needs to be changed.
How serious is the interaction between Clozapine and Escitalopram?
This interaction is classified as "minor" severity by the FDA. Minor interactions are unlikely to cause significant problems but should still be mentioned to your healthcare provider.
Why do Clozapine and Escitalopram interact?
Escitalopram slows down the process of clearing clozapine from your body. This leads to higher amounts of clozapine in your system than intended.
Understanding the Clozapine and Escitalopram Interaction
FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Clozapine belongs to the Atypical Antipsychotic class and Escitalopram belongs to the Selective Serotonin Reuptake Inhibitor (SSRI) class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Escitalopram slows down the process of clearing clozapine from your body. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Clozapine has 42 total documented interactions on file in this dataset, and Escitalopram has 12. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Watch for increased side effects like extreme sleepiness or dizziness, and talk to your doctor about whether your clozapine dose needs to be changed. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Clozapine or Escitalopram based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.