Terfenadine

69 interactions 4 explained in plain English

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated Jul 4, 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: Eribulin Injection Sertraline Dasatinib Oxaliplatin Injection Amisulpride Injection Ofloxacin

63 Contraindicated 6 Major

All (69) Contraindicated (63) Major (6)

Contraindicated

Terfenadine Amitriptyline Elavil Explained An increased risk of QT interval prolongation Details Terfenadine Sertraline Explained An increased risk of QT interval prolongation Details Terfenadine Buprenorphine Belbuca Explained An increased risk of QT interval prolongation Details Terfenadine Relugolix Orgovyx Explained An increased risk of QT interval prolongation Details Terfenadine Amisulpride Injection Barhemsys An increased risk of QT interval prolongation Details Terfenadine Arsenic Trioxide Trisenox An increased risk of QT interval prolongation Details Terfenadine Aripiprazole Injection Abilify An increased risk of QT interval prolongation Details Terfenadine Arsenic Trioxide Injection Trisenox An increased risk of QT interval prolongation Details Terfenadine Asenapine Transdermal Patch Secuado An increased risk of QT interval prolongation Details Terfenadine Azithromycin AzaSite An increased risk of QT interval prolongation Details Terfenadine Alfuzosin UroXatral An increased risk of QT interval prolongation Details Terfenadine Anagrelide Agrylin An increased risk of QT interval prolongation Details Terfenadine Bedaquiline Sirturo An increased risk of QT interval prolongation Details Terfenadine Chloroquine Aralen® An increased risk of QT interval prolongation Details Terfenadine Dasatinib Phyrago An increased risk of QT interval prolongation Details Terfenadine Degarelix Injection Firmagon An increased risk of QT interval prolongation Details Terfenadine Deutetrabenazine Austedo An increased risk of QT interval prolongation Details Terfenadine Disopyramide Norpace An increased risk of QT interval prolongation Details Terfenadine Dofetilide Tikosyn An increased risk of QT interval prolongation Details Terfenadine Dolasetron Anzemet An increased risk of QT interval prolongation Details Terfenadine Dolasetron Injection Anzemet An increased risk of QT interval prolongation Details Terfenadine Encorafenib Braftovi An increased risk of QT interval prolongation Details Terfenadine Entrectinib Rozlytrek An increased risk of QT interval prolongation Details Terfenadine Eribulin Injection Halaven An increased risk of QT interval prolongation Details Terfenadine Famotidine Calmicid An increased risk of QT interval prolongation Details Terfenadine Famotidine Injection Calmicid An increased risk of QT interval prolongation Details Terfenadine Felbamate Felbatol An increased risk of QT interval prolongation Details Terfenadine Flecainide Tambocor® An increased risk of QT interval prolongation Details Terfenadine Foscarnet Injection Foscavir An increased risk of QT interval prolongation Details Terfenadine Fostemsavir Rukobia An increased risk of QT interval prolongation Details Terfenadine Galantamine Razadyne An increased risk of QT interval prolongation Details Terfenadine Gatifloxacin Ophthalmic Zymar® An increased risk of QT interval prolongation Details Terfenadine Gemifloxacin Factive An increased risk of QT interval prolongation Details Terfenadine Glasdegib Daurismo An increased risk of QT interval prolongation Details Terfenadine Goserelin Implant Zoladex An increased risk of QT interval prolongation Details Terfenadine Granisetron Transdermal Patch Sancuso An increased risk of QT interval prolongation Details Terfenadine Granisetron Injection Granisol An increased risk of QT interval prolongation Details Terfenadine Histrelin Implant Supprelin An increased risk of QT interval prolongation Details Terfenadine Hydroxychloroquine Plaquenil An increased risk of QT interval prolongation Details Terfenadine Inotuzumab Ozogamicin Injection Besponsa An increased risk of QT interval prolongation Details

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