1. the act of perceiving; observation; attention: to escape notice. 2. take notice to pay attention; attend. 3. take no notice of to ignore or disregard. 4. information about a future event; warning; announcement. 5. a displayed placard or announcement giving information.
Nicotine: A Stimulant Nicotine, the chemical that makes addicts out of cigarette smokers, is a stimulant with properties similar to those of cocaine and amphetamine (speed). Nicotine provides the pick-me-up that smokers feel.
Stimulants are drugs that speed up the activity of the central nervous system. Stimulants are useful in treating many medical conditions, including ADHD, narcolepsy, asthma, obesity, and depression. There are several types of stimulants, including caffeine, nicotine, cocaine, amphetamines, and methamphetamines.