"i&rsquo;m a 19 year old athletic kid, and when i was prescribed this 3 years ago it did wonders. it was my junior year of high school and i was prescribed 10mg twice a day, once in the morning and once at lunch, with an optional one in the afternoon if i had a lot of homework or studying. my grades were much better and it didn&rsquo;t have any side effects. now, 3 years later i have a bad tolerance and i had to up my dosage to 20mg three times a day. i now take it to even make it to class and if i don&rsquo;t take it i can barely stay awake. like many people said it makes you feel extremely sluggish like a zombie, and it&rsquo;s an absolutely awful feeling. i lose emotions, have mood swings and even my sex drive with my girlfriend is completely destroyed."