"unbelievable! i think and concentrate much better , focus, it does effect for men a little down below, but it makes you focus so you are very hi libido. men know what i am talking about. it is great for that you mind does not wonder.  i&#039;ve only been on it for a week, it works immediately. and yes you worry because you can see things so good, and you are not used to it. so i get scared, that should go away. try it. you don&#039;t like, try something else, controlled substance, hard to get. psychiatry will get this for you, and you need prior authorization depending on insurance."