Drug interactions
Formoterol + Gemifloxacin
Severity: Moderate
Formoterol and Gemifloxacin: 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
Gemifloxacin can prolong the QT interval and formoterol may add to this effect. The combination raises the risk of torsades de pointes, particularly with hypokalemia or cardiac disease.
What this interaction means in plain words
Formoterol and Gemifloxacin 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; Gemifloxacin belongs to Anti Bacterial.
Why it happens
Additive QT prolongation, with beta-2 agonist hypokalemia increasing arrhythmic risk.
What to do
Check ECG and correct potassium and magnesium in patients at risk. Consider an antibiotic with less QT effect if multiple 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 Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Frequently asked questions
Can I take Formoterol with Gemifloxacin?
MediHelp rates the interaction as moderate. Formoterol and Gemifloxacin 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. Gemifloxacin can prolong the QT interval and formoterol may add to this effect. The combination raises the risk of torsades de pointes, particularly with hypokalemia or cardiac disease.
How serious is the interaction between Formoterol and Gemifloxacin?
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 ECG and correct potassium and magnesium in patients at risk. Consider an antibiotic with less QT effect if multiple 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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