It is meant to help with the constant adrenaline surges and heart racing. I am only taking one of the three a day recommended as I am highly sensitive to all medications. Now a month in all good daytime but I have woken during the night to extreme heart racing and other times feeling like it's going too slow. I have had this before but never to wake me up and I feel worse than I usually would lying down as most of my symptoms are caused by being upright. Would anyone suggest if they think I should be taking it twice a day or maybe stop altogether? Also had two glasses of wine at night on one of the nights but that was twelve hours after the tablet. My specialist is away,and I just really want to know that this stuff isn't going to give me a heart attack or stop my heart lolz. Extreme maybe but I hate not knowing. Thanks.