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Estrumate (Cloprostenol Sodium), Prostaglandin Analogue Injectable

Estrumate (Cloprostenol Sodium), Prostaglandin Analogue Injectable

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Estrumate (Cloprostenol Sodium), Prostaglandin Analogue is a compounded formulation containing Cloprostenol Sodium, prepared by Mixlab for veterinary use. Available by prescription.

Giving your pet an injection might feel intimidating at first, but with practice, it becomes routine. Follow these steps for safe and stress-free injections.

Get Your Supplies Ready

  1. Medication vial or pre-filled syringe
  2. Alcohol swabs
  3. Sterile syringe & needle (if not pre-filled)
  4. Sharps container for safe needle disposal

Drawing Up the Dose (if needed)

  1. Clean the vial top with an alcohol swab
  2. Attach needle to syringe
  3. Pull in air equal to the dose
  4. Insert needle into vial, push air in
  5. Draw out the correct dose
  6. Tap out air bubbles

Pick the Injection Site

  1. Subcutaneous (under the skin): Loose skin between shoulder blades or side
  2. Intramuscular (into muscle): As directed by your vet

Prep the Area

  1. Pinch a fold of skin to form a “tent” (for subcutaneous). Wipe with alcohol if recommended.

Inject the Medication

  1. Hold the syringe like a pencil
  2. Insert the needle into the base of the skin tent at a 45° angle
  3. Push the plunger slowly to inject

After the Injection

  1. Remove the needle smoothly
  2. Place it immediately in the sharps container (don’t recap)
  3. Pat the area and give your pet praise or a treat

Safety Tips

  1. Never reuse needles
  2. Always dispose of used needles properly
  3. Ask your vet for help if unsure

This compounded formulation contains estrumate prostaglandin analogue. In compounding practice, clinicians may consider it based on the established properties of the active ingredient. Your veterinarian determines whether it is appropriate for your animal.

This description reflects the general pharmacology of the active ingredient's drug class; your veterinarian determines whether this approach is appropriate for your animal.

Prescription only. Use only under the direction of a licensed veterinarian. This information is not a substitute for veterinary diagnosis, prescribing or monitoring. Compounded drugs are not approved by the FDA for safety or effectiveness.

Commonly observed effects of Estrumate administration, particularly in horses, include transient sweating, increased respiratory rate and mild abdominal discomfort or colic-like symptoms. These effects typically appear within minutes of administration and are often self-limiting, though owners should monitor the patient closely. In cattle, site reactions or localized swelling may occur. A critical safety point involves human handling: Estrumate can be absorbed through the skin and is associated with significant respiratory and reproductive risks in humans, particularly those with asthma or those who are pregnant. Because of this, anyone handling the medications must wear non-porous protective gloves (such as chemical-resistant nitrile or neoprene) and avoid direct contact or inhalation. If you observe persistent physical distress in your animal or if accidental human exposure occurs, contact your veterinarian or a medical professional promptly.

This medication is typically used with extra caution or avoided in animals with known respiratory conditions, such as acute or chronic bronchoconstriction, as prostaglandins can influence airway diameter. It is also strictly evaluated in pregnant animals where maintaining the pregnancy is the goal, as Estrumate is associated with unintended termination of pregnancy. Before starting a protocol, ensure your veterinarian has a complete history of all other prescriptions and supplements your animal is receiving. Your veterinarian is the right person to design a comprehensive monitoring plan and provide guidance on the necessary duration of use to ensure the management approach remains suitable for your animal's health status.

Do I need a prescription to get Estrumate for my pet?

Yes. Estrumate is a potent prescription medication and can only be dispensed by a licensed pharmacy upon receipt of a valid authorization from a licensed veterinarian. Mixlab verifies all authorizations before any medication is prepared or shipped to your farm or stable.

Can Estrumate be compounded for my pet?

Yes. While Estrumate is available as a commercial injectable solution, Mixlab can compound the active ingredient, cloprostenol sodium, into alternative strengths or customized delivery formats if your veterinarian determines a specialized preparation better suits an individual patient's needs. The decision between a commercial and compounded product rests with the prescribing veterinarian.

Why are gloves required when handling Estrumate?

Veterinarians emphasize the use of gloves because cloprostenol sodium is easily absorbed through human skin and can cause immediate smooth muscle contraction. This poses serious risks to humans, particularly the potential for bronchospasms in asthmatics or miscarriage in pregnant individuals, making proper protective equipment essential.

What is the difference between Estrumate and natural prostaglandin?

Veterinarians discuss Estrumate because it is a synthetic analogue that is much more potent and receptor-specific than the natural form of prostaglandin. This allows for a smaller volume of medication to be used while still achieving the clinical objective of regressing the corpus luteum and restarting the reproductive cycle.

What side effects should I watch for in my horse?

Owners should monitor for transient sweating, a faster breathing rate and signs of mild abdominal discomfort, which typically occur shortly after the injection. These signs generally resolve on their own within an hour, but you should contact your veterinarian if the horse shows signs of persistent distress or severe colic.

Mixlab is a licensed veterinary pharmacy dispensing both compounded and commercial medications, operating under the oversight of licensed pharmacists and in compliance with applicable state and federal pharmacy regulations. Compounded medications are prepared in compliance with USP standards and under PCAB-accredited practices. All medications dispensed by Mixlab require a valid prescription from a licensed veterinarian.
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