That's what I was assuming as well...right off hand I thought that 20mg might be too high for me because, again, of the weight issue. I truthfully don't have any idea if that's actually the case, but...I was simply basing it off of the fact that I have a very large male friend who was prescribed 30's specifically, according to his doctor, because of his weight. Which makes perfect sense considering how medications are dispersed within your body...

And, hey, I don't know! I had a physical examination from my general physician, was confirmed that I do not currently have a heart murmur...and my psych knows every detail of that history, because it is actually the main concern I had myself! So I am just trusting them and assuming they know what they're doing with me and believe I'm in no immediate danger being on an amphetamine. All things to ponder, though, for sure...