a substance that is used as a medicine or narcotic

cause to be alert and energetic

a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

a medication used as a stimulant to the central nervous system

a drug or other agent that stimulates sexual desire

a colorless pungent liquid sometimes used as a stimulant drug by drug abusers

the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant