Foscarnet Injection

259 interactions 371 cited references

Also sold as: Foscavir Foscavir®

About Foscarnet Injection

Foscarnet injection is used alone or with ganciclovir (Cytovene) to treat cytomegalovirus (CMV) retinitis (an eye infection that can cause blindness) in people who have human immunodeficiency virus (HIV) infection. Foscarnet injection is also used to treat herpes simplex virus (HSV) infections of the skin and mucous me… Read the full Foscarnet Injection drug information page →

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated Aug 9, 2026 · Editorial policy · Data sources

Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →

Most serious with: Dronedarone Cisapride Levoketoconazole Levomethadyl Mesoridazine Pimozide

15 Contraindicated 244 Major

All (259) Contraindicated (15) Major (244)

Contraindicated

Foscarnet Injection Arsenic Trioxide Trisenox An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Bepridil An increased risk of QT interval prolongation Details Foscarnet Injection Cisapride Propulsid® Increased risk of QT interval prolongation Details Foscarnet Injection Dronedarone Multaq Increased risk of QT interval prolongation Details Foscarnet Injection Levoketoconazole Recorlev An increased risk of QT interval prolongation and an increased risk of torsade de pointes Details Foscarnet Injection Levomethadyl An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Mesoridazine An increased risk of QT interval prolongation Details Foscarnet Injection Pimozide An increased risk of QT interval prolongation Details Foscarnet Injection Piperaquine An increased risk of QT interval prolongation Details Foscarnet Injection Probucol An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Saquinavir An increased risk of QT interval prolongation Details Foscarnet Injection Sparfloxacin An increased risk of QT interval prolongation Details Foscarnet Injection Terfenadine An increased risk of QT interval prolongation Details Foscarnet Injection Thioridazine An increased risk of QT interval prolongation Details Foscarnet Injection Ziprasidone Geodon An increased risk of QT interval prolongation Details

Major

Foscarnet Injection Acecainide An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Acyclovir Avaclyr Nephrotoxicity Details Foscarnet Injection Adagrasib Krazati An increased risk of QT interval prolongation, torsade de pointes, polymorphic ventricular tachycardia, other serious arrhythmias Details Foscarnet Injection Ajmaline An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Alfuzosin UroXatral Increased risk of QT interval prolongation Details Foscarnet Injection Amikacin Nephrotoxicity Details Foscarnet Injection Amiodarone Nexterone An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Amisulpride Barhemsys Increased risk of serious ventricular arrhythmias such as torsades de pointes Details Foscarnet Injection Amitriptyline Elavil An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Amoxapine An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Amphotericin B Nephrotoxicity Details Foscarnet Injection Anagrelide Agrylin Increased risk of QT interval prolongation Details Foscarnet Injection Apomorphine Apokyn Increased risk of QT interval prolongation Details Foscarnet Injection Aprindine An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Aripiprazole Abilify An increased risk of QT interval prolongation Details Foscarnet Injection Aripiprazole Lauroxil Aristada An increased risk of QT interval prolongation Details Foscarnet Injection Artemether An increased risk of QT interval prolongation Details Foscarnet Injection Asenapine Saphris Increased risk of QT interval prolongation Details Foscarnet Injection Aspirin Acuprin® Increased aspirin exposure and an increased risk of nephrotoxicity Details Foscarnet Injection Astemizole An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Atazanavir Reyataz Increased risk of QT interval prolongation Details Foscarnet Injection Azimilide An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Azithromycin AzaSite Increased risk of QT interval prolongation Details Foscarnet Injection Bedaquiline Sirturo Increased risk of QT interval prolongation Details Foscarnet Injection Bretylium An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details

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Educational information only, not medical advice. Always confirm interactions with your pharmacist or prescriber before making any change to your medications.