Hmm idk where to start. My friend has been telling me about this and I'm a little concerned. Is this safe? Has anyone here used it before? I think it may be illegal in some states but I doubt that will stop him. Should I be concerned about his safety? What are typical side effects about it. I mean I'm going to need a solid argument to persuade him to stop using it..if it's dangerous at least. My biggest concern is how does it effect the heart? Thanks.