Me and my girlfriend picked up some real good coke last night. We are going to a $uicideboy$ show tonight and wanna get fucked up beforehand. I am prescribed 20mg of propranolol and I take it in the morning before school. I took it at 6:30 this morning. We plan on doing coke probably around 3-4, then maybe again at like 6 before the concert. Would this be safe for me to take? Also, would the effects of the coke be hindered at all even though the propranolol wore off a while ago? Thank you. Also this is the first time either of us have done coke.