1) Anodynes 2) Certain sedatives 3) Heroin and morphine 4) Heroin and others 5) Heroin and the like 6) Morphine and codeine 7) Morphine and codeine, for two 8) Narcotic drugs 9) Narcotics 10) Numbers 11) Oxycodone et al 12) Oxycodone, and others 13) Pain killers 14) Pain relievers 15) Poppy products 
Naturally produced chemical in the body that has effects similar to morphine.
Naturally occuring basic (alkaloid) molecules with a complex fused ring structure. Have high pharmacological activity. See morphine.
Drugs derived from opium such as morphine and codeine, together with the semisynthetic congeners such as heroin.
Drugs derived from opium, such as heroin and morphine.