I am taking 180mg Diltiazem twice a day. Seems like it's keeping my heart rate in 70's and my BP is fine - I do have quite a lot of swelling in my ankles and legs. I am 86 and also have diabetes but I am very tall and thin. I also use a BiPap when I sleep. I've been taking 10mg Lasix and my dr just told me to take 20mg x 2 for one day and then take 20mg per day until the swelling goes away. Anyone else have excessive swelling whilst on Diltiazem?