Generic Name: trandolapril and verapamil (tran DOLE a pril and ver AP a mill) Brand Names: Tarka What is Tarka (trandolapril and verapamil)? Verapamil is in a class of drugs called calcium channel blockers. Verapamil relaxes (widens) your blood vessels (veins and arteries), which makes it easier for your heart to pump and reduces its workload. Trandolapril is in a class of drugs called angiotensin-converting-enzyme inhibitors (ACE inhibitors). Trandolapril prevents the constriction (narrowing) of blood vessels (veins and arteries). Trandolapril and verapamil is used to treat hypertension (high blood pressure). Trandolapril and verapamil may also be used for purposes other than those listed in this medication guide.