hey doctor , I get a panic attack always before doing a presentation , so i used to take inderal 20mg , i used to take two pills of it before doing a presentation at uni , and now i can t find this dose anymore so the doc gave me a concor 2.5 , is one pill of it will give me the effect of 2 pills of inderal 20 mg ? or should i take 2 ? because the inderal really helped with the anxiety attack ! thanks