ive had such severe anxiety that ive had flutters that have lasted for half an hour at a time..its got that bad ive had to go to the doctors and she gave me propranolol..im so scared of medication..i took one to calm down but later read on line you can have a heart attack if you stop this medication..im now terrified..can some one please explain how it works to me. the doctor said to take one when im anxiuos..how much do i need to take before it becomes dangerous to stop? if that makes sense..would be so grateful for some advice please..i dont usually take medication through fear of side effects. now im so ill with anxiety i have no choice. :( i have a 14 month old to look after and im so worried. i have no family.