"i posted a couple of months ago...but wanted to post again since i&#039;ve been on vyvanse a little longer and have more to share. i&#039;m a 40 year old woman.this medication has changed my life and i can&#039;t say enough positive things about it. my doctor and i were discussing it last night and he said that not everyone has the success that i&#039;ve had on it...everyone is different. i take 70mg and it does last all day. no bad side effects except i&#039;ve lost 15lbs, so i must watch that. also..dry mouth. otherwise, vyvanse gets the highest marks with me. for bad pms..i take lithium for 7 days prior to start of period..and that keeps the &quot;meanies&quot; away. :)"