i’ve been on 10mg for a day short of 3 weeks now. i think my heart has chilled out a little bit but not entirely. when i go to bed at nite it seems to be beating pretty fast. tomorrow i drop down to 5mg. i wonder if the drug has done much of anything. not due for another blood test for another 3 weeks or so but would love to get one to see if anything has changed in 3 wks – doubtful – i think it takes 5 to work thru ur blood system.