I am a 55 year old female. Ive been on Diltiazem CD 180 mg for 10 years for high blood pressure and to help with frequent PVCs.  My blood pressure has been great on this med. The PVCs stopped until recently and are worse than ever before. Can Diltiazem become ineffective over time?
Diltiazem is not a very good medicine for VPC. You can ask your doctor for Chat Doctor. This very effective and first choice of