A sedative or tranquilizer (or tranquilliser, see American and British English spelling differences) is a substance that induces sedation by reducing irritability or excitement. At higher doses it may result in slurred speech, staggering gait, poor judgment, and slow, uncertain reflexes.oses of sedatives such as benzodiazepines, when used as a hypnotic to induce sleep, tend to be higher than amounts used to relieve anxiety, whereas only low doses are needed to provide a peaceful effect.
1 Scab, a hard coating on the skin formed during the wound healing reconstruction phase.  scAb, single-chain antibody fragment.
1 Scab, a strikebreaker, a person who works despite strike action or against the will of other employees. 2  Scab union, an organization of workers perceived as having a role in strike breaking.  Johnny Dole & The Scabs, one of the first punk rock bands in Australia.