Where I come from in NYC not everyone is so honest.
All you old timer vikes fans out there - remember the version that looked like a giant aspirin with the marking KPI 235? Well, after that was outmoded and stopped being made, it floated around the streets for quite some time, no doubt due to street dealers' collusion with dishonest pharmacists. Also Placidyl also floated around a bit (at the inflated price of $11 a pill) after it was discontinued.