Took 15mg blue Adderall pill and now I can't sleep. It was not prescribed and I feel fine, more relaxed, but I can't sleep - it's 2am. How long will the effects last and how can I maintain drowsiness at school afterwards?

No you will be tired. They are not working right! Stop taking them and call the doctor you got them from. It not yours don't ever take again. You are too young for that strong med. It is SUPER bad stuff. Please leave alone!!! And as always God Bless