Drug interactions
Asenapine transdermal + Foscarnet
Severity: Moderate
Asenapine transdermal and Foscarnet: 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 drugs can prolong the QT interval, so combined use may raise the risk of ventricular arrhythmias. Foscarnet-related electrolyte disturbances add to this risk.
What this interaction means in plain words
Asenapine transdermal and Foscarnet 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.
Why it happens
Additive QT prolongation with electrolyte disturbances.
What to do
Monitor the ECG and correct potassium, magnesium and calcium before and during therapy. Choose a less QT-active alternative if the patient has other risk factors.
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 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 Asenapine transdermal with Foscarnet?
MediHelp rates the interaction as moderate. Asenapine transdermal and Foscarnet 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 drugs can prolong the QT interval, so combined use may raise the risk of ventricular arrhythmias. Foscarnet-related electrolyte disturbances add to this risk.
How serious is the interaction between Asenapine transdermal and Foscarnet?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor the ECG and correct potassium, magnesium and calcium before and during therapy. Choose a less QT-active alternative if the patient has other risk factors.
What other medicines interact with Foscarnet?
MediHelp also lists interactions of Foscarnet with, for example, Cidofovir, Pimozide, Thioridazine. The full list is on the Foscarnet page.
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