Testosterone suspension has a reputation of being an extremely potent injectable, often ranked highest among the testosterones. Very fast acting, testosterone suspension will sustain elevated testosterone levels for only 2-3 days. This drug is very effective for building muscle mass, its side effects are also very extreme. The testosterone in this compound will convert to estrogen very quickly, and has a reputation of being the worst testosterone to use when wishing to avoid water bloat. Gynocomastia is also seen very quickly with this drug and cannot be used without an anti-estrogen. Blood pressure and kidney functions should also be looked at during heavy use. Another very noticeable effect from this drug is that it can dramatically increase the sex drive when it is used in the short term, but, as with other testosterones, the long term use can lead to impotence and sexual dysfunction. Suspension is not a common drug outside the U.S. and Canada, so with the disappearing "real" American versions, availability has become very scarce. There are currently many fakes being circulated, with real products seen only rarely.