Drug interactions
Formoterol + Ofloxacin
Severity: Moderate
Formoterol 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
Ofloxacin can prolong the QT interval, and formoterol may add to QTc effects and lower potassium. The combination may increase arrhythmia risk in patients with cardiac disease or electrolyte disturbance.
What this interaction means in plain words
Formoterol 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.
Formoterol belongs to Respiratory; Ofloxacin belongs to Anti Bacterial.
Why it happens
Additive QT prolongation with beta2-agonist-induced hypokalemia.
What to do
Correct potassium and magnesium and consider an ECG in high-risk patients; consider an alternative antibiotic if other QT risk factors are present.
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 Formoterol
- Adagrasib + Formoterol Major
- Amiodarone + Formoterol Major
- Amisulpride + Formoterol Major
- Amitriptyline + Formoterol Major
- Amoxapine + Formoterol Major
- Arformoterol + Formoterol Major
Other interactions of Ofloxacin
- Ofloxacin + Thioridazine Contraindicated
- Adagrasib + Ofloxacin Major
- Amiodarone + Ofloxacin Major
- Amisulpride + Ofloxacin Major
- Anagrelide + Ofloxacin Major
- Arsenic trioxide + Ofloxacin Major
Frequently asked questions
Can I take Formoterol with Ofloxacin?
MediHelp rates the interaction as moderate. Formoterol 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. Ofloxacin can prolong the QT interval, and formoterol may add to QTc effects and lower potassium. The combination may increase arrhythmia risk in patients with cardiac disease or electrolyte disturbance.
How serious is the interaction between Formoterol 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: Correct potassium and magnesium and consider an ECG in high-risk patients; consider an alternative antibiotic if other QT risk factors are present.
What other medicines interact with Formoterol?
MediHelp also lists interactions of Formoterol with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Formoterol page.
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