... 88–90, 108 concepts 32 plasma half-lives 32, 88–90, 108 –9, 123, 180 emotions 10 11, 13, 52–3, 156–7, 184 enantiomers 21 endocrine glands 11, 13 endogenous compounds cannabis 90, 102 opiates 109 10, ... processes 32, 108 ethnic minorities 106 first-time usage 111 half-life 108 –9 health consequences 111–16 historical background 103 –6, 107 –8 main properties 4, 6, 33–4, 103 –17 metabolism processes 107 –9 ... concepts 11 analgesic effects 4, 6, 33–4, 85, 90, 92–3, 100 , 103 –17, 143, 146 anandamide 19–20, 90 cannabis 90, 100 opiates 103 –17, 143, 225 anandamide 90 ‘‘angel dust’’ see phencyclidine anhedonia...