I am 47 year old male who started on high blood pressure medicine for the first time in my life in August. I completed a half marathon on 9NOV14 in 2:11 minutes. Last week and again this morning, my heart races for no reason in the morning after I have coffee and take my blood pressure medicine. Also, I break out in sweats and my hands tremble which scares me because this is all new to me. It feels like I am having a panic attack, my legs feel like jello and i get lightheated but then it goes away.