1.   Poisoning by laudanum, or other opium derivatives, is a comparatively gradual process.

2.   Hydrocodone, also an opium derivative, is the active ingredient in Vicodin, Lortab and Lorcet.

3.   The restrictions have done little to thwart a booming black market for the opium derivative.

4.   Glaznovsky blamed the outbreak on the practice of selling street drugs, especially a popular opium derivative, by the dose, already loaded into syringes.

5.   The most popular kinds are cheap opium derivatives and home-made chemical concoctions.