Every stimulant I have ever tried makes me tired, so tired that I feel like I am about to die. Cocaine,Speed,Amphetamine,Ephedrine,Adderall,Coffeine and so on. If I take a Redbull, go straight to sleep. Drink coffe, do straight to sleep. I have no symptoms of ADHD. In fact I am the opposite. That is why I have tried these things, to see if anything can make me more awake.