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This page contains information on OvaCyst for veterinary use.
The information provided typically includes the following:
  • OvaCyst Indications
  • Warnings and cautions for OvaCyst
  • Direction and dosage information for OvaCyst


This treatment applies to the following species:
Manufacturer: Aspen

ANADA 200-069, Approved by FDA

50 mcg/mL

(Gonadorelin Diacetate Tetrahydrate)


For the treatment of cystic ovaries in cattle

OvaCyst Caution

Federal law restricts this drug to use by or on the order of a licensed veterinarian.


OvaCyst™ is a sterile solution containing 50 micrograms of gonadorelin (GnRH) diacetate tetrahydrate per milliliter suitable for intramuscular or intravenous administration. Gonadorelin is a decapeptide composed of the sequence of amino acids-


a molecular weight of 1182.32 and empirical formula C55H75N17O13. The diacetate tetrahydrate ester has a molecular weight of 1374.48 and empirical formula C59H91N17O21.

Gonadorelin is the hypothalamic releasing factor responsible for the release of gonadotropins (e.g., LH, FSH) from the anterior pituitary. Synthetic gonadorelin is physiologically and chemically identical to the endogenous bovine hypothalamic releasing factor.

PHARMACOLOGY AND TOXICOLOGY: Endogenous gonadorelin is synthesized and/or released from the hypothalamus during various stages of the bovine estrus cycle following appropriate neurogenic stimuli. It passes via the hypophyseal portal vessels, to the anterior pituitary to effect the release of gonadotropins (e.g., LH, FSH). Synthetic gonadorelin administered intravenously or intramuscularly also causes the release of endogenous LH or FSH from the anterior pituitary.

Gonadorelin diacetate tetrahydrate has been shown to be safe. The LD50 for mice and rats is greater than 60 mg/kg, and for dogs, greater than 600 mcg/kg, respectively. No untoward effects were noted among rats or dogs administered 120 mcg/kg/day or 72 mcg/kg/day intravenously for 15 days.

It has no adverse effects on heart rate, blood pressure, or EKG to unanesthetized dogs at 60 mcg/kg. In anesthetized dogs it did not produce depression of myocardial or system hemodynamics or adversely affect coronary oxygen supply or myocardial oxygen requirements.

The intravenous administration of 60 mcg/kg/day of gonadorelin diacetate tetrahydrate to pregnant rats and rabbits during organogenesis did not cause embryotoxic or teratogenic effects.

The intramuscular administration of 1000 mcg to normally cycling dairy cattle had no effect on hematology or blood chemistry.

Further, gonadorelin does not cause irritation at the site of intramuscular administration in dogs. The dosage administered was 72 mcg/kg/day for seven (7) days.

INDICATIONS AND DOSAGE: OvaCyst™ (Gonadorelin) is indicated for the treatment of ovarian follicular cysts in dairy cattle. Ovarian cysts are nonovulated follicles with incomplete luteinization which result in nymphomania or irregular estrus.

Historically, cystic ovaries have responded to an exogenous source of luteinizing hormone (LH) such as human chorionic gonadotropin. OvaCyst™ initiates release of endogenous LH to cause ovulation and luteinization.

The recommended intravenous or intramuscular dosage of OvaCyst™ is 100 mcg/cow.

Each mL of OvaCyst™ contains:

Gonadorelin diacetate tetrahydrate

50 mcg

Benzyl Alcohol

9 mg

Sodium Chloride

7.48 mg

Water for Injection, U.S.P.


pH adjusted with potassium phosphate (monobasic and dibasic).

Store between 15°C and 30°C (59°F and 86°F)

How Supplied

OvaCyst™ is available in a concentration of 50 mcg/mL. pH adjusted with potassium phosphate (monobasic and dibasic).

OvaCyst™ is supplied in multi-dose vials containing 12 mL or 36 mL of sterile solution.

For Animal Use Only

Not For Human Use


Manufactured for: Aspen Veterinary Resources®, Ltd., Kansas City, MO 64161

Rev. 12-02



12 mL Multi Dose Vial

Rev. 10-02

36 mL Multi Dose Vial


NAC No.: 14751162

Telephone:   816-415-4324
Fax:   816-415-4314
Every effort has been made to ensure the accuracy of the OvaCyst information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2017 North American Compendiums. Updated: 2017-04-21