I know a lot of what you say makes sense Anvil, but these tablets are not meant to be a sedation, they are a very LOW dose beta blocker...you are not meant to feel mentally confused after you take them..I don't feel mentally confused when they wear off.
I used to be a nurse and my pulse rate is very low hours after I take these compared to the other day.
I know what you are saying about not ignoring medical advice, but the NHS being so overstretched kills thousands of people a year (google it!) so sometimes I think you have to not just blindly take medicines which an overstretched doctor who doesn't know you prescribes when it makes you feel ill to take and feel better when it wears off