Originally Posted by
panic_down_under
This sounds like a surge of adrenaline followed by an increase in anxiety to me, not psychosis.
Propranolol works by blocking beta adrenaline receptors which should prevent the adrenaline rush, but it seems the dose is either inadequate, or because propranolol only has a very short half-life there may not have been much in your system if there was a long gap between the last dose and this happening. Do you take the 20mg in a single dose, or divided over 2-3 times a day and how long had it been since the last dose when this occurred?