Yikes, dont do pure salvia extract. Doses need to be uber measured. 5x is 1.5% salvinorin. So 100% salvinorin... I think doses fit on the size of a pin and shit.

If you feel something from plain-leaf, which alot of people dont, you're probably going to be comfortable with 10x. I don't even feel anything off 5x, but 20x makes me fucking insane. 3 hits of 15x is my comfortable dose. And Im a bit of a salvia-hardhead. I can toke on plain leaf for 5 minutes full and Ill get nothing but sore lungs. Same with 5x. 10x is nice, and 15x is perfect.