Flunitrazepam

What it isA potent intermediate-acting benzodiazepine hypnotic, marketed abroad but never in the United States.

Why this oneIt matters mostly as a hazard: its potency, amnestic effect, and notoriety in drug-facilitated assault made it the emblematic “date-rape” benzodiazepine.

What limits itIn the U.S. it is a trafficked, not prescribed, drug — encountered in toxicology screens rather than pharmacies.