tcd004 writes: PBS NewsHour published an investigation into Bath Salts, the sometimes legal, little understood street drug that has been linked to bizarre and violent behavior. The chemistry behind bath salts, it turns out, is as fascinating as the side effects. Tests show that the most common application of bath salts works in two-phases with a time-release mechanism. The drug first blasts the user with dopamine, but then limits the ability of the brain to soak it back up. And, researchers think, a unique "fish hook" shaped molecule means that the drug can get locked in, and take days, or even weeks to wear off— often, too late for users who are driven to extreme violence or suicide.