Stimulant drugs work by causing nerve fibres to release noreadrenaline and other stimulating neurotransmitters. End result= release of more stimulating neurotransmitters
It makes people feel wakeful alert and often happy
heart beats faster, blood pressure rise.
fingertips and tips ofnose becomes cold
laxative effect
some of these effects are mediated by the sympathetic system( chemical messenger= noradrenaline) which cause the adrenaline secretion by adrenal gland.
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