Clomid can produce similar results , and some doctors may prescribe it "off-label" (meaning it is used to treat people with a condition other than the one the medicine was approved for) to men to treat low testosterone, said Dr. Ron Wiehle of Repros Therapeutics, the study's lead author. "Still, it seems that Clomid works inconsistently, and [some] physicians are wary of its use," Wiehle said. And no groups are pushing for its use, either. "No drug company will champion Clomid since its patent lapsed a long time ago," he said.
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.