Maybe you should see a doctor..I would probably say they are just like diet pills...They are bad for your heart..I would take the pills and show them to your doctor and get a check up..Just to make sure they havent already done damage..Because if you've never had problems with your heart until now im sure its probably the pills...I would stop taking them until you find out information about them..Its better to be safe than sorry !

I have never taken any kind of enhancment pills.....So I can't say what to expect. I just thought id give u a few suggestions that may make u feel better.
Before u take any kinds of diet,enhancing,pills of any sort u may want to talk to ur Dr. It is important for u to know of any risks, and dangers , or chemicals that may be harmful that are in some of these pills .
As far as the heart palpatations, I wouldn't think that that is normal. U may be taking other medications that u shouldn't mix with this pill. Or that can be one of the side affects to this pll.
If I were u...I would stop taking the pill if it is causing u discomfort and speak to ur dr about it.
In the future, always read up on these types of pills. Sometimes if u mix like tylenol, and a diet pill it can be really bad, (just an example), and u need to know the risks and the dos and don'ts about any kind of supplement u are about to take. U should always be well informed on anything u put into ur body. That way u are in the clear and understand more about the side affects.
I'm sorry I can't be more help to then this.....
I wish u the best of luck