I was on Adderall IR for a year. My psych doc wrote me a script during my second year of law school despite the fact that neither him nor I believed that I had ADD/ADHD. I started out with 20/20 mg pills per month. As I developed a tolerance I eventually got up to 45/20 mg pills per month.
My reasons for quitting include: rapid heartbeat, high blood pressure, lack of sleep, social withdrawal, severe weight loss, social awkwardness, paranoia, etc.
I have currently been off Adderall for 2.5 months and it has been a rollercoaster. I have experienced depression, anxiety, fatigue, and inability to concentrate. While I've found that exercise and a healthy diet help, most of the time I still feel like a madman. In a week I have to take law school exams without the aid of prescription stimulants and I am afraid that I will not be able to cut it.
In conclusion, I believe that I have done damage to my dopamine receptors that may never fully heal. It amazes me that Adderall has wreaked so much havoc in my life in such a short time and at a relatively low dose. It saddens me that these drugs are given to kids. Thanks to all of you out there that contribute to this amazing online resource. I will keep my fellow Adderall Withdrawal Warriors in my prayers.