OvaMed (Altrenogest) Solution for Horses, slide 1 of 1

OvaMed (Altrenogest) Solution for Horses, 1000-mL

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OvaMed is a progestin used to suppress estrus cycles in mares to maximize breeding efficiency. OvaMed can help reduce moodiness and temperament changes due to estrus. May also be used to keep your mare out of heat.

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OvaMed (altrenogest) Solution 0.22% produces a progestational effect in mares.

Possible Side Effects

Adverse reactions are uncommon at the recommended doses. This medication may cause mild changes in blood levels of calcium, potassium and liver enzymes. It may exacerbate uterine infections in mares with pre-existing uterine inflammation. All medication has the potential to cause an immediate allergic or anaphylactic reaction. Affected animals may have a swelling, hives, changes in respiration, and display signs of agitation. This can be a severe and life threatening reaction, immediate veterinary care may be required. Notify your veterinarian immediately if your horse experiences any adverse reactions to this medication

Drug & Food Interactions

Always tell your veterinarian about medications and supplements your pet is taking before using OvaMed.


OvaMed is readily absorbed by the skin. Skin contact must be avoided; protective gloves must be worn when handling this product.

  1. Prescribing Information

See all items by OvaMed

  • Item Number
  • Generic Name
  • Common Brand Name(s)
    Regu-Mate, Altren, OvaMed
  • For Use With
  • Administration Form
  • Product Form
  • Health Condition
    Estrus Postponement
  • Drug Type


Recommended Dosage

Detach syringe and administer solution orally at the rate of 1mL per 110 pounds body weight (0.044 mg/kg) once daily for 15 consecutive days.

Storage Instructions

Store at or below 77°F.


What if I'm accidentially exposed to the product?

Altrenogest is readily absorbed from contact with the skin. In addition, this oil based product can penetrate porous gloves. Altrenogest should not penetrate intact rubber or impervious gloves; however, if there is leakage (i.e., pinhole, spillage, etc.), the contaminated area covered by such occlusive materials may have increased absorption. The following measures are recommended in case of accidental exposure. * Skin Exposure: Wash immediately with soap and water. * Eye Exposure: Immediately flush with plenty of water for 15 minutes. Get medical attention. * If Swallowed: Do not induce vomiting. OvaMed contains an oil. Call a physician. Vomiting should be supervised by a physician because of possible pulmonary damage via aspiration of the oil base. If possible bring the container and labeling to the physician.

Who should not handle this product?

  • Women who are or suspect they are pregnant.
  • Anyone with thrombophlebitis or thromboembolic disorders or with a history of these events.
  • Anyone with cerebral-vascular or coronary-artery disease.
  • Women with known or suspected carcinoma of the breast.
  • People with known or suspected estrogen-dependent neoplasia.
  • Women with undiagnosed vaginal bleeding.
  • People with benign or malignant tumors which developed during the use of oral contraceptives or other estrogen-containing products.
  • Anyone with liver dysfunction or disease.
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  • 5 out of 5 stars

    Best price!

    By Robin on Aug 12, 2021

    Being frugal I always try to buy at the best price possible and I found it at Chewy. The difference in price between this product vs buying thename brand for altrenogest means enough savings to spend on 2-3 wormers.

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