Drug interactions
Budesonide-formoterol + Foscarnet
Severity: Major
Budesonide-formoterol and Foscarnet: major 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
Foscarnet can prolong the QT interval and cause electrolyte disturbances such as low calcium, magnesium and potassium. Formoterol adds QTc and hypokalemic effects, increasing arrhythmia risk.
What this interaction means in plain words
Budesonide-formoterol and Foscarnet can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Budesonide-formoterol belongs to Respiratory; Foscarnet belongs to Anti Virals.
Why it happens
Additive QT prolongation compounded by foscarnet-induced electrolyte depletion and beta2-agonist hypokalemia.
What to do
Monitor ECG and electrolytes (potassium, magnesium, calcium) closely and correct abnormalities promptly. Consider alternatives to formoterol during foscarnet therapy if QT risk is high.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Budesonide-formoterol
Other interactions of Foscarnet
- Cidofovir + Foscarnet Contraindicated
- Foscarnet + Pimozide Contraindicated
- Foscarnet + Thioridazine Contraindicated
- Foscarnet + Vandetanib Contraindicated
- Adagrasib + Foscarnet Major
- Adefovir + Foscarnet Major
Frequently asked questions
Can I take Budesonide-formoterol with Foscarnet?
MediHelp rates the interaction as major. Budesonide-formoterol and Foscarnet can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Foscarnet can prolong the QT interval and cause electrolyte disturbances such as low calcium, magnesium and potassium. Formoterol adds QTc and hypokalemic effects, increasing arrhythmia risk.
How serious is the interaction between Budesonide-formoterol and Foscarnet?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor ECG and electrolytes (potassium, magnesium, calcium) closely and correct abnormalities promptly. Consider alternatives to formoterol during foscarnet therapy if QT risk is high.
What other medicines interact with Budesonide-formoterol?
MediHelp also lists interactions of Budesonide-formoterol with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Budesonide-formoterol page.
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