"i am a 32 year old. i have been on vyvanse for about 2 weeks now and i love it. i have never been diagnosed with add and about 2 months ago i was given straterra first. i hated that. my doctor switched me to 30mg vyvanse and the first day i noticed a difference. it lasted me about 10-12 hrs. my appetite went down a little but nothing to bad. other than that there are no other side effects for me. i would definitely recommend vyvanse."