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 Lidoflazine An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Lofexidine Increased risk of QT interval prolongation Details Foscarnet Injection Lonafarnib Zokinvy An increased risk of QT interval prolongation and torsade de pointes Details Foscarnet Injection Loperamide Diamode An increased risk of QT interval prolongation, which may increase risk of cardiotoxicity (torsade de pointes, cardiac arrest) Details Foscarnet Injection Lorcainide An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Lumefantrine Increased risk of QT interval prolongation Details Foscarnet Injection Macimorelin Increased risk of QT interval prolongation Details Foscarnet Injection Mavorixafor Xolremdi An increased risk of QT interval prolongation and torsade de pointes Details Foscarnet Injection Mefloquine Lariam® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Methadone Diskets Increased risk of QT interval prolongation Details Foscarnet Injection Methotrexate Jylamvo Nephrotoxicity Details Foscarnet Injection Methotrimeprazine Increased risk of QT interval prolongation Details Foscarnet Injection Metronidazole Flagyl An increased risk of QT interval prolongation Details Foscarnet Injection Mifepristone Korlym Increased risk of QT interval prolongation Details Foscarnet Injection Milsaperidone An increased risk of QT interval prolongation Details Foscarnet Injection Mirtazapine Mirataz Increased risk of QT interval prolongation and torsades de pointes Details Foscarnet Injection Mizolastine Increased risk of QT interval prolongation Details Foscarnet Injection Mobocertinib Exkivity An increased risk of QT interval prolongation Details Foscarnet Injection Moricizine Increased risk of QT interval prolongation Details Foscarnet Injection Moxifloxacin Avelox Increased risk of QT interval prolongation Details Foscarnet Injection Nelfinavir Viracept Increased risk of QT interval prolongation Details Foscarnet Injection Neomycin Nephrotoxicity Details Foscarnet Injection Netilmicin Nephrotoxicity Details Foscarnet Injection Nilotinib Increased risk of QT interval prolongation Details Foscarnet Injection Norfloxacin Increased risk of QT interval prolongation Details Foscarnet Injection Nortriptyline An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Octreotide Bynfezia An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Foscarnet Injection Ofloxacin Floxin® Increased risk of QT interval prolongation Details Foscarnet Injection Olanzapine Increased risk of QT interval prolongation Details Foscarnet Injection Olodaterol Striverdi An increased risk of QT interval prolongation and an increased risk of ventricular arrhythmias Details Foscarnet Injection Ondansetron An increased risk of QT interval prolongation Details Foscarnet Injection Osilodrostat Isturisa Increased risk of QT interval prolongation Details Foscarnet Injection Osimertinib Tagrisso Increased risk of QT interval prolongation Details Foscarnet Injection Oxaliplatin Increased risk of QT-interval prolongation Details Foscarnet Injection Ozanimod Additive effects on heart rate Details Foscarnet Injection Pacritinib Vonjo® An increased risk of QT interval prolongation Details Foscarnet Injection Paliperidone Erzofri Increased risk of QT interval prolongation Details Foscarnet Injection Panobinostat Farydak Increased risk of QT interval prolongation Details Foscarnet Injection Papaverine Pavacot® Increased risk of QT interval prolongation Details Foscarnet Injection Paromomycin Nephrotoxicity 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.