What are sedatives and hypnotics? Definition.
Sedatives are the drugs that subdues excitement and calms the subject without inducing sleep, through drowsiness maybe produced….or sedatives are drugs which reduce excitement and cause sedation.
sedation refers to ;
Non rapid eye movement (NREM) sleep 70 -75%
Rapid eye movement (REM) sleep (paradoxical sleep)
stage – zero – eye movements are irregular
stage -one – (dozing) eye movements are reduced
stage – two – (unequivocal) easily arousable
stage – four – cerebral sleep, difficult to arouse.
Hypnotics are drugs which produce sleep and so are used in case of insomnia (sleeplessness).
The same drug can act as a hypnotic or sedative or both depending upon the dose, hypnotics and sedatives depress the central nervous system for producing sleep and sedation.
THE COMMONLY USED DRUGS AS SEDATIVES AND HYPNOTICS :-