Drug interactions
Clozapine + Ofloxacin
Severity: Moderate
Clozapine and Ofloxacin: 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
Both drugs can prolong the QT interval, and clozapine is also linked to myocarditis and arrhythmias. Combined use may increase the chance of serious ventricular arrhythmia, especially with other risk factors.
What this interaction means in plain words
Clozapine and Ofloxacin 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.
Clozapine belongs to Central Nervous System; Ofloxacin belongs to Anti Bacterial.
Why it happens
Additive delayed cardiac repolarization through potassium channel blockade.
What to do
Review other QT-prolonging drugs and correct electrolyte disturbances. Obtain a baseline ECG and repeat it if the patient has cardiac risk factors or symptoms such as palpitations or syncope.
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?
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Other interactions of Ofloxacin
- Ofloxacin + Thioridazine Contraindicated
- Adagrasib + Ofloxacin Major
- Amiodarone + Ofloxacin Major
- Amisulpride + Ofloxacin Major
- Anagrelide + Ofloxacin Major
- Arsenic trioxide + Ofloxacin Major
Other interactions of Clozapine
- Clozapine + Deferiprone Contraindicated
- Clozapine + Irinotecan Contraindicated
- Clozapine + Pimozide Contraindicated
- Clozapine + Thioridazine Contraindicated
- Acalabrutinib + Clozapine Major
- Adagrasib + Clozapine Major
Frequently asked questions
Can I take Clozapine with Ofloxacin?
MediHelp rates the interaction as moderate. Clozapine and Ofloxacin 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. Both drugs can prolong the QT interval, and clozapine is also linked to myocarditis and arrhythmias. Combined use may increase the chance of serious ventricular arrhythmia, especially with other risk factors.
How serious is the interaction between Clozapine and Ofloxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Review other QT-prolonging drugs and correct electrolyte disturbances. Obtain a baseline ECG and repeat it if the patient has cardiac risk factors or symptoms such as palpitations or syncope.
What other medicines interact with Ofloxacin?
MediHelp also lists interactions of Ofloxacin with, for example, Thioridazine, Adagrasib, Amiodarone. The full list is on the Ofloxacin page.
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