<p><strong>Pharmacodynamics</strong>: Medroxyprogesterone Acetate injection has prolonged progestational effects when administered by intramuscular injection. This injection suppresses the secretion of pituitary gonadotropins which, in turns, prevents follicular maturation producing long-term anovulation in the reproductive aged women. Medroxyprogesterone Acetate injection suppresses the Leydig cell function in the male. i.e. suppresses endogenous testosterone product.<br />
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<strong>Pharmacokinetics</strong>: Parenteral Medroxyprogesterone Acetate is a long acting progestational steroid. The 150 mg/ml formulation reaches half its initial concentration in about 27 days. Its long duration of acting results from its slow absorption from the injection site. The principle metabolite of medroxyprogesterone acetate that has been identified is a 6-alpha-methyl-6 beta 17 alpha, 21 trihydroxy-4-pregnene-3, 20-dione-17 acetate which is excreted in the urine.</p>