I just started taking Propranolol yesterday and they started me on 10mg per day as needed. I am not sure if this is going to help me I have PTSD and take Venlafaxine for that. My doc says that I am experiencing Anxiety during stressfull situations at work. I feel that I am high strung all the time. Any clue if this medication is going to help me? Also yesterday I took the whole 10mg and was tired all day and in a fog. Today I cut it in half and took half in AM at like 8am and the other half like 20 minutes ago 12:20 pm it gives me a massive headache as soon as I take it. Can someone please let me know if this is going to work for me.