Drug interactions
Atomoxetine + Fostemsavir
Severity: Moderate
Atomoxetine and Fostemsavir: 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
QT prolongation has been seen with supratherapeutic fostemsavir exposure, and atomoxetine has a small potential to affect QT. Combined risk is mainly relevant in patients with other QT risk factors.
What this interaction means in plain words
Atomoxetine and Fostemsavir 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.
Atomoxetine belongs to Central Nervous System; Fostemsavir belongs to Anti Virals.
Why it happens
Potential additive QT interval prolongation.
What to do
Obtain an ECG and correct electrolytes in patients with QT risk factors. Monitor if other QT-prolonging drugs are used.
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 Atomoxetine
- Atomoxetine + Isocarboxazid Contraindicated
- Atomoxetine + Linezolid Contraindicated
- Atomoxetine + Phenelzine Contraindicated
- Atomoxetine + Procarbazine Contraindicated
- Atomoxetine + Rasagiline Contraindicated
- Atomoxetine + Selegiline Contraindicated
Other interactions of Fostemsavir
- Apalutamide + Fostemsavir Contraindicated
- Carbamazepine + Fostemsavir Contraindicated
- Enzalutamide + Fostemsavir Contraindicated
- Fostemsavir + Mitotane Contraindicated
- Fostemsavir + Phenytoin Contraindicated
- Fostemsavir + Rifampicin Contraindicated
Frequently asked questions
Can I take Atomoxetine with Fostemsavir?
MediHelp rates the interaction as moderate. Atomoxetine and Fostemsavir 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. QT prolongation has been seen with supratherapeutic fostemsavir exposure, and atomoxetine has a small potential to affect QT. Combined risk is mainly relevant in patients with other QT risk factors.
How serious is the interaction between Atomoxetine and Fostemsavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain an ECG and correct electrolytes in patients with QT risk factors. Monitor if other QT-prolonging drugs are used.
What other medicines interact with Atomoxetine?
MediHelp also lists interactions of Atomoxetine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Atomoxetine page.
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