In Canada we have most of the popper brands available in the US but I haven't yet found Amsterdam or any
British brands. Problem is they cannot be posted across a border.
Real Rochfort, a brand I find only in Canada, is my favorite, but something in the compound burns hell out of my nose so I usually inhale through my mouth. I find Taiwan Blue to be quite smooth, but Rush does nothing for me. Fortunately I have never experienced headaches.
Very recently I spotted a report saying poppers can be damaging to the macular of the eye, which is a bit scary. I am trying to find out more about that study. Still I have to say that poppers turn me into a real slut, whether I am going down on a guy or having my ass pounded! And yes, my inhibitions really take a hit: when a well hung stud is slamming his big breedin' tool in my ass and I'm on poppers, he owns my ass!