The effect of dexamethasone is basically similar to that of hydrocortisone, but the effect is strong, the effect lasts for a long time, and the side effect is small. The anti-inflammatory and gluconeogenesis effects were 25 times greater than those of hydrocortisone, while the effects of water and sodium retention and potassium excretion were slightly less than those of hydrocortisone. The inhibitory effect on the pituitary - adrenal cortical axis is strong. In addition to the above effects, this product can also be used to induce labor of female animals during the same period of delivery, but it can increase the rate of placenta retention, delay lactation, and make the uterus late to return to normal state. After intramuscular administration of the drug to dogs, it shows rapid systemic action, reaching peak blood concentration in 0.5 h, eliminating half-life for about 48 h, and mainly excretion through feces and urine.