I'm not the person you asked, but I figured I'd add my two cents. I have tried two different medications, with very different results in the side-effects depart

I'm not the person you asked, but I figured I'd add my two cents. I have tried two different medications, with very different results in the side-effects department. The first one I tried for about a year was Adderall (the regular release one, not the XR). With Adderall I noticed significant loss of appetite, to the point that I had to actively remind myself to eat, like other people here have mentioned. It was interesting, because I would feel my stomach sending the "I'm hungry" signal, but it was trivial to ignore it. It wasn't until I would go 12 hours without eating and start to feel light headed that I would realize, "oh... I need to eat something." However, I still enjoyed food very much. Unlike someone else in these comments said, I didn't feel like I was merely ingesting sustenance vs. enjoying my meal. Whether a few hours or 12 since my last meal, as soon as I started eating I would think "oh wow, I was really hungry. and this is tasty." Currently I am taking Vyvanse. All other things aside, one of the very noticeable differences between Vyvanse and Adderall (for me) is the loss of appetite. With the Vyvanse, although I am able to go without eating for much longer than without, I still get hungry. With no meds I might say I feel like I'm starving after 4 hours. With Vyvanse I might say that after 5-6, though I will usually eat before that, because it is definitely noticeable in a normal time frame. With Adderall, I had to actively remind myself to eat, otherwise I might get dizzy and light headed first.