Chemical Formula: C19H28O2 Description Sustanon is used to treat confirmed testosterone deficiency in males. The active substances of Sustanon are turned into testosterone by your body. Testosterone is the natural male hormone known as an androgen. In men, testosterone produced by the testicles. It is necessary for the growth, development and function of the male sex organs and for secondary male sex characteristics. It is necessary for the growth of body hair, the development of bones and muscles, and it stimulates the production of red blood cells. It also makes men’s voices deepen. Preparations containing testosterone are used to replace testosterone in a person who has low or no natural testosterone (a condition known as hypogonadism). Your doctor may have prescribed it for another reason. Ask your doctor if you have any questions about why this medicine has been prescribed to you. A doctor’s prescription is required to obtain this medicine. This medicine is not expected to affect your ability to drive a car or operate machinery. Mechanism of action Treatment of hypogonadal men with Sustanon 250 results in a clinically significant rise of plasma concentrations of testosterone, dihydrotestosterone, estradiol and androstenedione, as well as decrease of SHBG (Sex hormone binding globulin). Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are restored to the normal range. In hypogonadal men, treatment with Sustanon 250 results in an improvement of testosterone deficiency symptoms. Moreover, treatment increases bone mineral density and lean body mass, and decreases body fat mass. Treatment also improves sexual function, including libido and erectile function. Treatment decreases serum LDL-C, HDL-C and triglycerides and increases haemoglobin and haematocrit, which may lead to polycythaemia. No clinically relevant changes in liver enzymes and PSA have been reported. Testosterone also produces systemic effects, such as increasing the retention of sodium, potassium and chloride leading to an increase in water retention. Treatment may result in an increase in prostate size, and worsening of lower urinary tract symptoms, but no adverse effects on prostate symptoms have been observed. In hypogonadal diabeteic patients, improvement of insulin sensitivity and/or reduction in blood glucose have been reported with the use of androgens. In boys with constitutional delay of growth and puberty, treatment with Sustanon 250 accelerates growth and induces development of secondary sex characteristics. In female-to-male transsexuals, treatment with Sustanon 250 induces masculinisation.TESTO C