Thanks for the info Captain was working on something so didn't have a chance to search.
Oddly enough I find I get less headaches when I spit, though it seems like that may be placebo.

I use suboxone as a hold over on days when I'm not dosing full agonists.
I use between 125 micrograms and .5mg in a single dose, with a max of 1.25mg in a 24 hour time period, usually .5 to .75mg.
I take it sublingually with a bastardized version of 6/7's, basically under the tongue and add a lil alcohol under tongue with it.
Seeing as it's such small amounts I figure it's not worth the extra effort to use the cotton he mentioned.
Note that I don't take it on a regular basis, maybe once or twice a week every few weeks.
I was going to ask the sublingual vs oral bio-availability but with oral being so low, it seems somewhat redundant.