Exactly what are Stimulants in Canada? Stimulants are a class of drugs that speed up interaction among the Mind and system. they will enhance an individual's emotions of wakefulness, alertness, self esteem, and Strength. Stimulants involve: lawful Substances: Caffeine and nicotine remedies: Dexamphetamines, Adderall, methylphenidate (Ritalin) Illi