Factrel for Cattle Size:20 mL - 10 Dose - Rx Required Additional treatments may be recommended

Additional treatments may be recommended on Days 4 and 5

Zuprevo is not for use in female dairy cattle 20 months of age or older

estrus generally occurs within 1 to 3 days

Rain-fast after 6 hours

Contains 3% diflubenzuron

Factrel for Cattle Size:20 mL - 10 Dose - Rx Required Additional treatments may be recommendedZoetis Animal Health Prescription Required Download the Midwest Food Animal Prescription Form. Factrel is indicated for the treatment of ovarian follicular cysts in cattle. Factrel may be used with Lutalyse to synchronize estrus cycles to allow fixed time artificial insemination in lactating dairy cows. Each ml of Factrel solution contains 50 micrograms of synthetic gonadorelin hydrochloride. Gonadorelin is the gonadotropin releasing hormone (GnRH).