Hi, a year and a half ago I had an ablation procedure for atrial fibrillation . I was taking diltiazem 360mg a day . A couple of months ago I asked the Dr. If I could try to stop taking the diltiazem . He said I could try 120 mg and see how I did . The last week or two my BP has gone up and my pulse has gone up quit a lot . So tonight I started taking the 360 again. . I see my Dr. Next week . Thank you . Bonnie ( I'm 74 years old .)