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)

Moderate

Quinidine Trospium / Xanomeline Cobenfy Explained Increased xanomeline exposure and an increased risk on severity and frequency of xanomeline-related adverse reactions Details Quinidine Aspirin Acuprin® Prolonged bleeding times Details Quinidine Aspirin Rectal Aspirin Prolonged bleeding times Details Quinidine Atenolol Tenormin Explained Bradycardia, hypotension Details Quinidine Galantamine Razadyne Increased galantamine plasma concentrations Details Quinidine Memantine Namenda Altered plasma levels of memantine and quinidine Details Quinidine Nisoldipine Sular Quinidine toxicity (ventricular arrhythmias, hypotension, exacerbation of heart failure) or decreased efficacy of nisoldipine Details Quinidine Patiromer Veltassa Reduced quiNIDine exposure and reduced efficacy of quiNIDine 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.