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.
J.A.Turton. 1  Sheep-scab is a condition in sheep caused by infestation with a particular type of mite (Psoroptes ovis, known as the sheep-scab mite). You may see wool in the mouth of the sheep and wool may also be found on fences and other objects against which the sheep rub. 2  Fluid leaks from the irritated skin, and dries to form yellow crusts or scabs. 3  This is why the condition is called scab. 4  You will see bare, scabby patches and matted wool.