[freebeard]

Ritalin, or something like it, supposedly helps everyone. People with it improve. People without it gain super powers.

Originally Posted by Wikipedia

Methylphenidate, sold under the trade name Ritalin among others, is a stimulant medication used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy.[2] It is a first line medication for ADHD.[2] It may be taken by mouth or applied to the skin....

Common side effects include trouble sleeping, decreased appetite, anxiety, and weight loss.[2] More serious side effects may include psychosis, allergic reactions, prolonged erections, abuse, and heart problems. [2] Methylphenidate is believed to work by blocking dopamine and norepinephrine reuptake by neurons.[5][6] Methylphenidate is a central nervous system (CNS) stimulant of the phenethylamine and piperidine classes.[2][7]

... It is estimated that in 2013, 2.4 billion doses of methylphenidate were taken worldwide.[9] About 80% of this was taken by people in the United States, making it the 47th most prescribed medication there.[9][10] It is available as a generic medication.[2] In the United States, the wholesale cost of the immediate release formulation is less than US$0.30 per dose as of 2018.[11]

Are you sure you're not thinking of psilocybin?