Can i use propranolol 40 mg for anxiety 1 hour befor stressful situation because i had symptoms of anxiety despite using indral 10 mg ?

Try a small increase: Propranolol is the generic name for the trade name drug Inderal. It works for anxiety by blocking heart receptors that normally act to speed up the heart which can be particularly stimulated during stress/anxiety. The problem with higher doses of propranolol, is it can lower blood pressure if up-titrated too fast which can cause dizziness and possibly one to pass out.