PSYC 3250 Chapter 15: Chapter 15: Drugs Addiction and the Brain’s Reward Circuits
1 Nov 2016
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Chapter 15: drugs addiction and the brain"s reward circuits. Psychoactive drugs: drugs that influence subjective experience and behaviour by acting on the nervous system. Once swallowed, drugs dissolve in the fluids of the stomach and are carried to he intestine, where they are absorbed into the bloodstream. Intragastric: infused in the stomach they do not have to reach the intestine to be absorbed. Drugs that are not absorbed from the digestive tract or that are broken down into inactive (cid:373)eta(cid:271)olites (cid:894)(cid:271)reakdo(cid:449)(cid:374) produ(cid:272)ts of the (cid:271)ody(cid:859)s (cid:272)he(cid:373)i(cid:272)al rea(cid:272)tio(cid:374)s(cid:895) (cid:271)efore they (cid:272)a(cid:374) (cid:271)e absorbed must be taken by some other route. Disadvantages = absorption from the digestive tract into the bloodstream can be influenced by factors as the amount and type of food in the stomach. Common in medical practice because effects of injected drugs are strong, fast, and predictable. Injections typically made: subcutaneously (sc) into the fatty tissue just beneath the skin.
