Drug interactions
Ofloxacin + Perphenazine
Severity: Moderate
Ofloxacin and Perphenazine: 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 agents can prolong the QT interval, so using them together may increase the likelihood of ventricular arrhythmias including torsades de pointes. Patients with cardiac disease or electrolyte abnormalities are at higher risk.
What this interaction means in plain words
Ofloxacin and Perphenazine 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.
Ofloxacin belongs to Anti Bacterial; Perphenazine belongs to Central Nervous System.
Why it happens
Additive hERG potassium channel blockade causing delayed ventricular repolarization.
What to do
Check a baseline ECG and electrolytes and repeat the ECG if symptoms such as palpitations or syncope occur. Use a different antibiotic if QTc is already prolonged.
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 Perphenazine
- Ibutilide + Perphenazine Contraindicated
- Perphenazine + Pimozide Contraindicated
- Perphenazine + Thioridazine Contraindicated
- Adagrasib + Perphenazine Major
- Alfentanil + Perphenazine Major
- Amiodarone + Perphenazine Major
Frequently asked questions
Can I take Ofloxacin with Perphenazine?
MediHelp rates the interaction as moderate. Ofloxacin and Perphenazine 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 agents can prolong the QT interval, so using them together may increase the likelihood of ventricular arrhythmias including torsades de pointes. Patients with cardiac disease or electrolyte abnormalities are at higher risk.
How serious is the interaction between Ofloxacin and Perphenazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check a baseline ECG and electrolytes and repeat the ECG if symptoms such as palpitations or syncope occur. Use a different antibiotic if QTc is already prolonged.
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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