Good question! A lot of times people on speed get strung out and don't really stop to eat. So I guess it could go either way. However, people with ADHD should get the opposite effects of speed, which means they slow down and then maybe the appetite kicks in? Or it could always be stress related and have nothing to do with the medication. Either way, its probably worth mentioning it to your doctor and getting their opinion too.
Can speed cause one to binge eat? Adderall is speed. Surprise!!