Amphetamine / dextroamphetamine
"Such an amazing contribution to the pharmaceutical world. So much better than its ugly step sisters, such as Ritalin and Vyvanse. Adderall steals the show every time. 30mg/day does the trick. Been on it for 12 years, I've taken personal breaks for tolerance. I've never had any type of "withdrawal" or "come downs" at the end of the day. This drug has the ability to put me to sleep when I take it, honestly; and that's because my dissociation (caused by my ADHD) causes my anxiety to skyrocket. But when I take my adderall, I am able to focus on reality, making my anxiety disappear for a few hours. Calms me  down. Relief is a blessing."