Quinidine

91 interactions 8 explained in plain English
Also sold as: Cardioquin® Cin-Quin® Duraquin® Quinact® Quinaglute® Quinalan® Quinatime® Quinidex® Quinora®
About Quinidine

Quinidine is an antiarrhythmic medication used to treat certain types of irregular heartbeats. Read the full Quinidine drug information page →

Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated Jun 30, 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 →

Major

Quinidine Abametapir Explained Increased exposure of CYP3A4 substrate Details Quinidine Amitriptyline Elavil Explained Increased amitriptyline plasma concentrations; an increased risk of cardiotoxicity Details Quinidine Sertraline Explained An increased risk of QT interval prolongation Details Quinidine Buprenorphine Belbuca Explained An increased risk of QT interval prolongation Details Quinidine Relugolix Orgovyx Explained Increased relugolix exposure and an increased risk of QT interval prolongation Details Quinidine Acetazolamide Diamox® Sequels® Enhanced quinidine effects and quinidine toxicity Details Quinidine Amisulpride Injection Barhemsys Increased risk of serious ventricular arrhythmias such as torsades de pointes Details Quinidine Arsenic Trioxide Trisenox An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Aripiprazole Injection Abilify Increased ARIPiprazole exposure and an increased risk of QT interval prolongation Details Quinidine Arsenic Trioxide Injection Trisenox An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Asciminib Scemblix Increased CYP3A4 exposure and an increased risk of CYP3A4-related adverse reactions Details Quinidine Asenapine Transdermal Patch Secuado Increased risk of QT interval prolongation Details Quinidine Azithromycin AzaSite An increased risk of QT interval prolongation and serious cardiac events Details Quinidine Betrixaban Bevyxxa® Increased betrixaban exposure and increased risk of bleeding Details Quinidine Afatinib Gilotrif Increased exposure of afatinib Details Quinidine Alfuzosin UroXatral An increased risk of QT interval prolongation Details Quinidine Anagrelide Agrylin Increased risk of QT interval prolongation Details Quinidine Bedaquiline Sirturo Increased risk of QT interval prolongation Details Quinidine Brexpiprazole Rexulti Increased brexpiprazole exposure Details Quinidine Chloroquine Aralen® An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Cyclosporine Injection Atopica Increased cycloSPORINE exposure Details Quinidine Cyclosporine Ophthalmic Cequa Increased cycloSPORINE exposure Details Quinidine Dabigatran Pradaxa® Increased dabigatran exposure and an increased risk of bleeding Details Quinidine Dabigatran Etexilate Increased dabigatran exposure and an increased risk of bleeding Details Quinidine Dasatinib Phyrago An increased risk of QT interval prolongation Details Quinidine Degarelix Injection Firmagon Increased risk of QT interval prolongation Details Quinidine Deutetrabenazine Austedo Increased deutetrabenazine exposure; prolongation of QT interval Details Quinidine Digoxin Cardoxin® Increased digoxin exposure Details Quinidine Disopyramide Norpace An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Dofetilide Tikosyn An increased risk of cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Dolasetron Anzemet Cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Dolasetron Injection Anzemet Cardiotoxicity (QT prolongation, torsades de pointes, cardiac arrest) Details Quinidine Doxorubicin Adriamycin Increased DOXOrubicin exposure and an increased risk of DOXOrubicin-related adverse reactions Details Quinidine Edoxaban Savaysa Increased edoxaban exposure Details Quinidine Enasidenib Idhifa Reduced CYP3A substrate exposure and reduced efficacy of CYP3A substrate Details Quinidine Encorafenib Braftovi Increased risk of QT interval prolongation Details Quinidine Entrectinib Rozlytrek An increased risk of QT interval prolongation 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.