I am an adult in my mid 20s, and was diagnosed with ADHD my last year of college. I had a feeling that I have had it my whole life, but I finally went in to get tested when it truly was becoming the definition of a disorder (when it was interfering with daily tasks). I have tried methlyphenidate, Vyvanse, Adderall XR, and Vyvanse was the one that undoubtedly works best for me. I definitely noticed that it inhibits my appetite, but nothing to where I lost too much weight. I probably lost 3-4 lbs. I’m also very active, so that stimulates my appetite a lot more. Talk to your doctor about the mg dosage if you haven’t yet. I know sometimes lowering the dosage helps with increasing appetite. Also, I know that there is a medication that increases your appetite that is used to “combat” the appetite inhibiting side effect of the stimulant medications.