Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system.  Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.
Careful steroid selection and reasonable dosing are usually regarded as the most basic and reliable methods for preventing its onset. Many steroid users also frequently take some form of estrogen maintenance medication, which may effectively counter the effects of elevated estrogenicity. Common options include aromatase inhibitors such as anastrozole. The use of a PCT program at the conclusion of steroid administration (which usually includes several weeks of anti-estrogen use) is also commonly advised, as gynecomastia is sometimes reported in the post-cycle hormone imbalance phase when steroids are not actually being taken.
Trenbolone Hexahydrobenzylcarbonate represents the dominant large ester based Trenbolone compound on the market. It was first released by the France based Negma Laboratories in the late 1960’s under the trade name Parabolan. This represents the first and only Trenbolone hormone to ever exist in human grade form. Parabolan was prescribed for many years in cases of malnutrition, which will make a lot of sense as we dive into the compound. It was also prescribed to treat osteoporosis in some cases, as well as in the treatment of cachexia.