panic disorde
"I have had intense panic attacks when talking to a bunch of people, giving presentations and explaining myself to strangers. When giving presentations, there have been instances when i felt really embarrassing and humiliating due to panic attacks. My heart pounds like hell and my body is no more in my control with very narrow and blurring vision and shortness of breath. I checked my heartbeat once before presentation and it was 165-175 bpm. For the record, my bpm while running stays somewhere between 150-160 bpm. 



After taking a 40mg propanolol before 2 hours and 40mg before 1 hour (total of 80mg as i didnt know whether ot would work or not), i was very calm and in control and no more heart pounding, no more shortness of breath."