Hydroquinidine

51 interactions 3 explained in plain English
Dr. Brian Staiger, PharmD, BCPS
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: Disopyramide Olodaterol Oral Inhalation Deutetrabenazine Fostemsavir Oxaliplatin Injection Dolasetron Injection
51 Major
All (51) Major (51)

Major

Hydroquinidine Sertraline Explained An increased risk of QT interval prolongation Details Hydroquinidine Buprenorphine Belbuca Explained An increased risk of QT interval prolongation Details Hydroquinidine Relugolix Orgovyx Explained Increased risk of QT interval prolongation Details Hydroquinidine Amisulpride Injection Barhemsys Increased risk of serious ventricular arrhythmias such as torsades de pointes Details Hydroquinidine Arsenic Trioxide Trisenox An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Aripiprazole Injection Abilify An increased risk of QT interval prolongation Details Hydroquinidine Arsenic Trioxide Injection Trisenox An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Asenapine Transdermal Patch Secuado Increased risk of QT interval prolongation Details Hydroquinidine Azithromycin AzaSite An increased risk of QT interval prolongation and torsade de pointes Details Hydroquinidine Anagrelide Agrylin Increased risk of QT interval prolongation Details Hydroquinidine Bedaquiline Sirturo Increased risk of QT interval prolongation Details Hydroquinidine Chloroquine Aralen® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Dasatinib Phyrago An increased risk of QT interval prolongation Details Hydroquinidine Degarelix Injection Firmagon Increased risk of QT interval prolongation Details Hydroquinidine Deutetrabenazine Austedo An increased risk of QT interval prolongation Details Hydroquinidine Disopyramide Norpace An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Dofetilide Tikosyn An increased risk of QT interval prolongation Details Hydroquinidine Dolasetron Anzemet Cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Dolasetron Injection Anzemet Cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Encorafenib Braftovi Increased risk of QT interval prolongation Details Hydroquinidine Entrectinib Rozlytrek An increased risk of QT interval prolongation Details Hydroquinidine Flecainide Tambocor® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Foscarnet Injection Foscavir An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Fostemsavir Rukobia Increased risk of torsade de pointes Details Hydroquinidine Gemifloxacin Factive An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Glasdegib Daurismo Increased risk of QT interval prolongation Details Hydroquinidine Goserelin Implant Zoladex Increased risk of QT interval prolongation Details Hydroquinidine Histrelin Implant Supprelin Increased risk of QT interval prolongation Details Hydroquinidine Hydroxychloroquine Plaquenil Increased risk of QT interval prolongation Details Hydroquinidine Inotuzumab Ozogamicin Injection Besponsa Increased risk of QT interval prolongation Details Hydroquinidine Isradipine DynaCirc® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Hydroquinidine Ivabradine Corlanor Increased risk of QT prolongation Details Hydroquinidine Ketoconazole Topical Extina® Foam Increased risk of QT interval prolongation Details Hydroquinidine Lacosamide Injection Motpoly An increased risk of AV block, bradycardia, and ventricular tachyarrhythmia Details Hydroquinidine Lefamulin Xenleta Increased risk of QT interval prolongation Details Hydroquinidine Lenvatinib Lenvima Increased risk of QT-interval prolongation Details Hydroquinidine Levofloxacin Levaquin Increased risk of QT interval prolongation Details Hydroquinidine Levofloxacin Injection Levaquin Increased risk of QT interval prolongation Details Hydroquinidine Loperamide Diamode An increased risk of QT interval prolongation, which may increase risk of cardiotoxicity (torsade de pointes, cardiac arrest) Details Hydroquinidine Mefloquine Lariam® 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.