Testosterone Cypionate Injection, USP for intramuscular injection,
contains Testosterone Cypionate, USP which is the oil-soluble 17 (beta)-
cyclopentylpropionate ester of the androgenic hormone testosterone.
raw Testosterone Propionate powder
Testosterone Cypionate, USP is a white or creamy white crystalline
powder, odorless or nearly so and stable in air. It is insoluble in
water, freely soluble in alcohol, chloroform, dioxane, ether, and
soluble in vegetable oils.
The chemical name for Testosterone Cypionate, USP is
androst-4-en-3-one,17-(3-cyclopentyl-1-oxopropoxy)-, (17b)-. Its
molecular formula is C27H40O3 and the molecular weight 412.61.Endogenous
androgens are responsible for normal growth and development of the male
sex organs and for maintenance of secondary sex characteristics. These
effects include growth and maturation of the prostate, seminal vesicles,
penis, and scrotum; development of male hair distribution, such as
beard, pubic, chest, and axillary hair; laryngeal enlargement, vocal
cord thickening, and alterations in body musculature and fat
distribution. Drugs in this class also cause retention of nitrogen,
sodium, potassium, and phosphorus, and decreased urinary excretion of
calcium. Androgens have been reported to increase protein anabolism and
decrease protein catabolism. Nitrogen balance is improved only when
there is sufficient intake of calories and protein.
Androgens are responsible for the growth spurt of adolescence and for
eventual termination of linear growth, brought about by fusion of the
epiphyseal growth centers. In children, exogenous androgens accelerate
linear growth rates, but may cause disproportionate advancement in bone
maturation. Use over long periods may result in fusion of the epiphyseal
growth centers and termination of the growth process. Androgens have
been reported to stimulate production of red blood cells by enhancing
production of erythropoietic stimulation factor.
During exogenous administration of androgens, endogenous testosterone
release is inhibited through feedback inhibition of pituitary
luteinizing hormone (LH). At large doses of exogenous androgens,
spermatogenesis may also be suppressed through feedback inhibition of
pituitary follicle stimulating hormone (FSH).
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