It's a stimulant, so it could possibly exacerbate high BP while on cycle. Other than that I don't really see any direct interaction. Looks like you're running a bulking cycle then using a cutting drug though, kind of odd. I know you can cut or bulk on any drugs, but sust/deca is almost always used only for bulking. Btw, if you're heavy enough that your doc prescribed an anorectic agent, you're probably too heavy to be doing a cycle. Get your bf down some naturally first, then hit some gear if you need a boost to get a few more lbs off.