Stump,
Any nitrate/nitrite will DRAMATICALLY drop BP. I've got teeny bottles of NITROQUICK, which is a sublingul product stored in the freezer. I hope I never need them (for angina

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I think the main difference in the formulations stems from the fact that you want to treat angina VERY FAST but you want to prevent attacks and keep BP low over a very long time.
The stuff is available as a popper for a quick hit (glass ampules you break under your nose), a spray for under the tongue, sublingual tablets, and even a patch for long term administation of a small continuous dose.
As a BP drug, it is too frought with side-effects like a cracking nitrate headache and was superceded to a large event in the 60's once the first beta- blocker was invented. But it has no peer when it comes to stopping an angina attack in its tracks.
Since poppers provides a quick hit of NO (nitric oxide) to the cells, and NO is the chemical that makes for a male erection, they have long been used for "enhancing the experience," headache be damned.