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.
When first administering steroids, a man will have an increase in sexual function. This unfortunately is only temporary as your body becomes used to the steroid in its system. With prolonged use of a steroid, eventually, the man will feel less sexual desire, and will be less capable of maintaining an erection. Luckily, this is only temporary as well and can even be totally prevented with the use of substance such as Gonakor and HCG. Also when the steroid use is discontinued, the body’s natural level of testosterone (like the immune system) will certainly be suppressed.
When i received the pack was amazed to see the professional look. The vials were professionally labeled and had a strong smell like it just came out of a medical lab. I remember i had purchased these sustanons from a gym buddy which turned out to be fake. Not saying completely bunk but were not original. These ones looked completely different. The oils were smooth and easy to pin leaving almost no pip. Used 750mg/week pinned every Mon-Wed-Fri. In few weeks my body blown up into a water balloon. By that time I didn't run arimidex so immediately jumped on arimidex to control the bloat. Strength was through the roof. Deadlifts went from 180 to 220 and bench from 140 to 160 in a few weeks. By the end of 6 weeks i was up 10 lbs and bloat was under control. The other thing i loved about these, was the insane sex drive. I could go on for longer and kept me harder most of the times. Morning boners were more frequent and intense.
Sides were there. Plenty of bloat before arimidex, acne, oily skin, high blood pressure prior to arimidex usage.