How long does withdrawal from beta blockers usually last? I don't have any money to refill my propranolol prescription and haven't had it in 4 months. I was taking it for arrhythmias and high BP (160mg XR propranolol with 180mg XR diltiazam daily) and when I ran out 4 months ago I just kept taking the Dilt. hoping the symptoms were just withdrawals and that they would go away... Symptoms are what you would think, I'm just curious if to someone with similar conditions (i.e heart issues vs random friend who doesn't even know what a beta blocker is) thinks my symptoms are some weird extended withdrawal from propranolol or if it's just my symptoms that I get (tachycardia, shortness of breath, etc etc).