Quinidine

Name: Quinidine Drug Interactions
Creator: Dr. Brian Staiger, PharmD, BCPS

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 →

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 →

Most serious with: Lefamulin Ketoconazole Topical Colchicine Oxaliplatin Injection Dofetilide Goserelin Implant

3 Contraindicated 80 Major 8 Moderate

All (91) Contraindicated (3) Major (80) Moderate (8)

Contraindicated

Quinidine Colchicine Colcrys Explained Increased colchicine exposure and an increased risk of colchicine toxicity Details Quinidine Ketoconazole Topical Extina® Foam Increased quiNIDine exposure, increased risk of serious cardiovascular events and an increased risk of QT interval prolongation Details Quinidine Lefamulin Xenleta Increased lefamulin exposure, an increased risk of lefamulin-related adverse reactions, increased sensitive CYP3A4 substrate expos... 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.