Yes. I take it you mean 'diltiazem?' Then yes. I can't urge you to discontinue a prescription because I don't know you, and because I am not trained medically. I just have controlled atrial fibrillation. But those numbers indicate to me that you are almost hypertensive and nowhere near being hypotensive. If your systolic is below about 90 and your systolic is south of about 60 then, yes, you should let your cardiologist know ASAP. Right now, your diastolic is a bit on the high side, so keep on with the diltiazem.

Incidentally, I don't know if you know this, but when you take your own BP, take it rested, calm, and take it three times. Take the lowest number of the three. If that number is borderline, either high or low, let your cardiologist know.