Many people said snorting hurts, if thats what you mean:
https://www.dmt-nexus.me...aspx?g=posts&t=26140HyperspaceFool swore by using coconut cream to help with that..
Personally I havent ever heard of people that use snorting as main ROA, some people try with some or other success but I dont think people keep using that way as opposed to oral/vapped forever.
DMT fumarate (btw, its not fuRmaric acid, its fumaric) works just fine for ayahuasca, just dropped some in your caapi brew

Check FAQ for dosages.