phentermine I think you mean? I've taken it and var but not together and I'm a chick...but I don't know...phentermine is in the amphetamine family
its a pretty extreme appetite supressant; I don't know that one could really keep their protein intake high enough on it to keep muscle. Its also not a very clean stim but I know of people that love the stuff.
I wasn't that impressed myself and it can cause pretty decently bad heart valve problems
have you tried it before?