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.
Dianabol is a 17 alpha alkylated (17aa) anabolic steroid which can raise liver enzymes and cause damage at high doses and prolonged usage. It easily converts into estrogen and therefore anti-estrogens arimidex , femara and nolvadex are effective to reduce the risk of gynecomastia (bitch tits) and bloating. Cystic acne can form on the face, neck and shoulder regions due to stimulation of the sebaceous gland along with a sudden loss in mass and when the body excretes water after the cycle. Headaches, stomach aches, high blood pressure, nausea, and vomiting side effects may also occur.