Ritalin (or DL-methylphenidate, MPH) is a reuptake blocker for both the dopamine and norepinephrine transporters (DAT, NET). In terms of pharmacokinetics, MPH has high (~7%) uptake into the brain and reaches its peak concentration in the brain within 60 minutes[1,2]. read more
For example, Methylphenidate (better known as Ritalin) is a Dopamine Reuptake Inhibitor used to treat ADHD. Many Ritalin users report increased feeling of concentration (dopamine->motivation->concentration), but at the same time feelings of being "robots" and "zombies" - weird feelings that make them feel bad. read more