Pemoline is an 8-letter term that is used to describe a nervous system stimulant. It is a central nervous system stimulant drug that was once used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy, but has since been discontinued due to its potential for abuse and addiction. Pemoline is a synthetic compound that acts on the brain to increase alertness and reduce fatigue. It is also known to have some side effects, such as insomnia, irritability, and headaches.