... 60, 90, 120 mg; SR Cap ( 12 hr; Cardizem SR, various)60, 90, 120 mg; SR Cap (24 hr; Cardizem CD) 120 , 180, 24 0, 300 mg; (24 hr; Di-lacor XR) 120 , 180, 24 0 mg; (24 hr; Tiazac) 120 , 180, 24 0, 300, ... only 22 ± 8% is bioavailable be-cause of extensive first-pass elimination; bioavailability increases in liverdisease. 25 1Covera-HS provides a 4- to 5-hr delay before releasing the drug. Ver-apamil ... dis-ease; titrate to clinical response.Dosage Forms. Tab 40, 80, 120 mg; SR Tab 120 , 180, 24 0 mg; SR Cap 100, 120 , 180, 20 0, 24 0, 300 mg; Inj 2. 5 mg/mL; SR Tab 180 mg with trandolapril 2 mg, 24 0...