Damn you guys gotta step at dosage up.
Lyle McDonald, the dude who basically made yohimbine explode in popularity, recommended .2 mgs per kg. I'm 250 and I take 15 or 17.5 and that's not a real problem for me.
after so many people reported sensitivity to yohimbine I decided to start off slow and slowly build up to .2mg per kg.
I didn't feel anything at 2mg, some people freak out on it.