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)

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 Foscarnet Injection Bumetanide Bumex Impaired foscarnet elimination and potential for toxicity Details Foscarnet Injection Buprenorphine Belbuca An increased risk of QT interval prolongation Details Foscarnet Injection Bupropion Aplenzin Increased risk of seizures Details Foscarnet Injection Capreomycin Nephrotoxicity Details Foscarnet Injection Ceritinib Zykadia An increased risk of QT interval prolongation Details Foscarnet Injection Chloral Hydrate An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Chloroquine Aralen® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Chlorpromazine An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Cidofovir Nephrotoxicity Details Foscarnet Injection Ciprofloxacin Increased risk of QT interval prolongation Details Foscarnet Injection Citalopram Celexa Increased risk of QT interval prolongation Details Foscarnet Injection Clarithromycin Biaxin Increased risk of QT interval prolongation Details Foscarnet Injection Clofazimine An increased risk of QT interval prolongation Details Foscarnet Injection Clomipramine Anafranil An increased risk of QT interval prolongation and an increased risk of seizures Details Foscarnet Injection Clothiapine Increased risk of cardiac arrhythmias 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.