First of all, these supplements shouldn't be taken by people under the age of 18. I am not a big fan of "diet pills" and while the company who manufactures these can say just about anything they want...Unless they have been approved by the FDA, I wouldn't suggest taking them.
Lastly, with a known V-Tach arrhythmia, any type of "diet pill" is a NO,NO! Please consider the pros and cons if you choose to take these.
I am a 22 year old female and i was diagonosed with vtach when i was 14.I would so no to taking diet pills with caffeine in them. And if you do take diet pills please be sure to moniter your heart.Check to see if you get irregular heartbeats shortly after you take them and if so then stop.The best way to lose wait when having a heart condition is to take vitamins,eat healthy,and exercise daily.Not only lose weight but it will help your heart out=)