Although i’d wager most of it ends up in humans, it is still sold as a Vetrinary Steroid. As a vetrinary steroid it was never approved for human use, which makes it impossible to get a prescription for it in the usa. add this to the fact that it is a schedule 2 controlled substance in the united states and it becomes quite clear that the only way to get this steroid in the usa is to buy it on the black market. that being said, it is still relatively easy to obtain the real stuff. This is because smuggling almost 2x as much testosterone in the same space is a rather enticing thing, making it commonly available.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.