I do chat to the boys from Perpol (Liquid Gold) at alot of cons and this stuff is now banned because people don't seem to get the instructions on Viagra that says in letters bigger than the pills, don't take these if you take nitro based medication. However people still snort nitrates while on blues and mostly get infarctions but a few pop their clogs.
This may up in the bargain bin bud
also banned is Butyl Nitrate but now ISO-Butyl Nitrate is the latest, which they have a patant on, and license for the next 7-10 yrs