My first experience with this drug was when I had decided to pop a friend's 50mg Vyvanse in order to "check it out". The pill worked like magic. Heightened focus and a "calm" feeling unlike anything I had ever felt before. I persisted to take these 50mg Vyvanse pills for the next seven days, suffering no ill side effects other than a decrease in appetite and an increase in heart rate. After said seven days, I did not take another one until about a month later. Strangely enough, while coming off of the 50mg Vyvanse, I received muscles spasms throughout my body (they weren't painful). I just wanted someone to clarify why this would happen? I'd also like to share the fact that I was under the influence of marijuana simultaneously with the drug so perhaps that's why the muscle spasms occurred?

Anyways, I was prescribed Vyvanse 20mg pills about two months ago. They worked for perhaps the first hour of the first time I popped one then after that, nothing. I continued to take this medication as prescribed for about 2 weeks. Still no effects. Then I decided to hell with it, I'm doubling the dosage. The first time I did this I received mild effects, for perhaps a duration of 4 hours, then nothing. Even now, still on 40mg of Vyvanse, I feel no effects. I don't dare to increase to 60mg but I'm curious as to why the drug seems not to work at all even when 50mg of the same drug worked wonders for me a few months ago. Does tolerance build up that fast? I also took a 20mg Adderall perhaps a month ago and that seemed to work fairly well. I'm also taking Citalopram 20mg and Depakote 500mg, one of each a day, on top of two 20mg Vyvanse pills.