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.
Intramuscular (IM) Injection Procedure
It is optimal for an intramuscular injection to have in possession syringes without the tips (needles) already affixed to them. Preferably, the individual should have the hermetically sealed syringes (barrels) separate from the hermetically sealed needle tips. Although one can easily use syringes with the tips already affixed, it is slightly more complicated and adds an extra step or two into the process that otherwise would not be there. So, every individual should ensure to the best of their ability to have the syringe and needle tips separate. The following is a list of required items for intramuscular injections :
Despite its obvious benefits and limited side effects authorities have not endorsed the commercial sale of Deca Durabolin as an over the counter drug. This is to stop the usage of this drug in sports and other body building competitions. There is also the fear of abuse and although this drug has been termed a ‘side effects’ friendly drug across many spheres, the authorities have enough evidence which suggests that overdosing on Deca Durabolin or administering a cheaper rehashed version can prove to be extremely disastrous on the user’s health and well being.