Natural testosterone recovery will begin once you get off of Dianabol. The speed at which you recover and how much you recover is based on your use of drugs like Dianabol. For example, if this is the first time you have used and then gotten off of Dianabol, then you will have a pretty quick, natural recovery. Low testosterone conditions will only occur in rare cases where the hypothalamus, the pituitary gland, or the testicular region is damaged due to improper use of these drugs. Be aware that regardless, it will take some time for proper bodily function to return to pre-use levels. You can help ensure a smooth recovery by eating right, taking a lot of sleep, and living healthy.
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.