Buserelin for Injection
Bushelin
Buserelin
This product is white or off-white freeze-dried block or powder.
Pharmacodynamics Buserelin is a synthetic peptide hormone with a function analogous to the natural gonadotropin-releasing hormone(GnRH), which stimulates the pituitary to release follicle-stimulating hormone(FSH) and luteinizing hormone(LH) into the blood. In addition, administration of doses higher than clinically recommended doses does not further stimulate the release of FSH and LH. At the same time, buserelin stimulates gonadal steroid secretion. Buserelin has the ability to induce and synchronize ovulation for sow; and synchronize estrus in dairy cows and improve the pregnancy rate of dairy cows.
Pharmacokinetic. Buserelin is rapidly absorbed and excreted after injection. After injection, the body can rapidly release luteinizing hormone. The metabolism of buserelin occurs in the liver, kidney and pituitary gland, and all metabolites are small-molecule inactive peptides that are mainly excreted through urine.
It is used to induce ovulation in sows, synchronize estrus in dairy cows and improve the pregnancy rate of dairy cows.
For intramuscular use. See the table below for specific administration methods:
Table 1 Sow administration regimen
Items | Gilts | Sows |
Step1 | altrenogest was administered orally at 20 mg per gilt for 18 days | Weaning at the same time |
Step2 | Give 10 μg 115~ 120 hours after drug withdrawal | 10 μg after weaning 83~89 hours |
Step3 | After 30~33 hours then AI | |
Tale 2 Suitable cows administration regimen
Date | Step | Dosage | Note |
0day | Injection of Buserelin | 20 μg | / |
7 day |
Injection of Prostaglandins | Dosage of drugs for dissolution of the corpus luteum: D - sodium chloride forefront alcohol injection 150 μg Or cloprostenol sodium injection 0.4-0.6 mg Or chlorine forefront alcohol injection 0.5 mg Or trometamol prostaglandin F2 alpha injection 25 mg |
/ |
9 day |
Buserelin |
20 μg | Buserelin was injected 54 to 56 hours after the administration of prostaglandins. Cows that are suitable for early estrus should be injected with buserelin and inseminated at the same time. |
10 day | AI | / | After 72 hours of prostaglandins, ejaculation should be performed immediately if estrus is in advance. |
（1）None.
None.
Cattle 0 days; Withdrawal period for milk 0 hours.
（1）120 μg；（2）400 μg.
（1）120 μg, 1 vial+1 solvent/box；（2）400 μg, 1 bottle/box
Keep out of light and tightly sealed.
24 months