Hello Mistress Cheyenne,

Long time admirer here. Yes, this is correct. Originally, it was in the form of amyl nitrate and used to treat angina (chest pain/tightness).

https://www.medicalnewstoday.com/articles/324000

It basically relaxes smooth muscles such as blood vessels which thereby cause a drop in blood pressure. But, the side effect is “rush” of a warm trance-like feeling. Of course, smooth muscles are also found in the anus and rectum which is why poppers have been a mainstay in the gay and BDSM community for a long time. It also puts you in a horny headspace almost instantaneously.

I can personally attest that any play in that area is intensified with popper us, primarily because you can take more. Amyl nitrite is hard to find these days because it is a drug, but a lot of manufacturers skit the law by mixing different ingredients with the nitrate portion (alkyl, butyl, isobutyl, isopentyl). But, the nitrate portion is the active ingredient so they all pretty much do the same thing. But, to AspX’s point, there is no quality control so you don’t know for sure what you’re getting.