I posted a week ago about using Xanax and Inderal/Propranolol for public speaking-induced panic attacks. I was prescribed both recently and used them as prescribed on Weds. for an event. Yesterday and today I seem to be feeling some kind of rebound effect - I'm very anxious, with a racing heart and generally feeling shaky. Could this be an after-effect of the medication? I only took them that one day, other than a "practice run" with the Xanax (.5 mg dose) the week before. Feeling very strange and worried. Has anyone else experienced this?