International Verapamil-SR and Trandolapril Study for CAD and Hypertension: Assessing the benefits of a verapamil SR—based strategy versus an atenolol–based strategy in reducing morbidity and mortality in patients with hypertension and coronary artery disease.
Verapamil: Full prescribing information from RxList for this medication for cardiac conditions, sold under brand names including Calan, Verelan, and Covera-HS.
Verapamil - Familydoctor.org: Advice for patients on the use, mode of action, side effects, drug interactions, and other aspects of this medication sold as Calan, Covera-HS, Isoptin, and Verelan. In English and Spanish.