I can think of a few.
Demerol
Zopiclone (Done snort this shit, it even hurts when you taste it, and no point snorting it)
Trazadone (Another one not really good to snort)
I cant think of any more off the top of my head, I am addicted to snorting shit, I dont know why, but I will snort any pill at least once. I KNOW that clonazepam doesn't isnt water soluable and doesn't absorb in my nose but I still snort two of my pills a day, then chase it with water. My nose is made of steal I guess, but gotta stop the routine. 2 mg of clonazepam wasted basically.
I got a question though, if I chase my clonazepam with water, like white a bit of water usually about 4 little puddles in my hand, will that send it down my throat? I cant really taste it but I usually gag if my stomach is sore or something. Am I still wasting alot?