I bought 100g Lidocaine 8 years ago for these occasions. When I take anything that irritates my mucous membranes via the nasal or rectal route I sprinkle a tiny bit of lidocaine on top of it and there will be no discomfort and not even an urge to take a shit in the case of rectal use.Really? That's wild, it stung at first for me but then the pain grew and grew until I was pacing around wishing it would stop. I tried to flush my nose with water and it barely helped. My eyes were watering and the whole side of my face was throbbing after about 15 minutes.
I have tried it at 75mg and 50mg (with 15mg of it snorted), which seemed about the same in strength. I am going to try 100 at once next time, then more, probably increasing it until it seems like I shouldn't anymore or the gram is gone. It seems pretty benign.
However it puts strain on the tissue in its own way which can usually be felt the next day if you're as sensitive as me in that respect.
Those 100g would last me 5 lifetimes and it wasn't expensive either. Worth its weight in Safran, especially when you enjoy 2C's.