Well, I used to weigh about the same in high school, and I haven't grown since, so I guess it's alright so long as I don't lose another 20 pounds :))
Dunno how well you'll feel on 400, likely not very energetic, but it probably won't kill you... Then again, I'm doing 200+terbinafine, which itself reputedly has about the same liver-kicking potential as the 200, so maybe I'm overrating the strain itra can put on you. Also, the female of the species appears to be a hell of a lot more resilient, according to loads of different medical research...