Sometimes I use poppers during sex acts specifically isopropyl nitrate which is a legal type within the UK. Several times I have experienced Cyanosis and my partner noted my lips went blue and I noted my fingernails were blue. Have read up on the condition and wonder if this happens to other users? Silly question but is it dangerous? Is it possible to go a bit to far with this. For now I cut back my usage last time I just inhaled less and no Cyanosis was noted, not as fun though 8)