I too am on doxy! only 100mg a day though.
Have you tried eating before taking it? That should help the sickness. I've never experienced any side effects from it, that could just be me though. Everyone reacts differently to medication...
I've been on Doxy about 2 months now and my skin is awesome. The best it has ever been. Even if i get a spot, its not a red and inflamed as before and it goes away quicker! yay!
I did get an innitial break out, around the second or third week. It cleared up in a few days... I still get occasional problems, but nothing as bad as it was!
I'm sure babygirl will have something to say in this thread!