Yea. It is a veterinarian grade steroid used to keep cows from losing weight while being transported to slaughter:

Finaplix

But in order to use it effectively you have to convert it into an injectable form. The procedure looks involved, but not particularly difficult:

Trenbolone

Just to be clear: Buying Finaplix for human use, and ESPECIALLY converting it via the method just listed, is illegal in the US.

EDIT: Fixed finaplix link.