Your cat might have digestive issues, and you are thinking, “How Much Miralax for a 17 Pound Cat?” Cats can suffer from digestive problems, one of which is constipation. Constipation in cats is not just uncomfortable; it can be a severe health concern.

A common remedy for this condition is Miralax (polyethylene glycol 3350), which is used to treat constipation in humans and has also been found to be used in veterinary medicine. This post is a detailed guide on using Miralax for constipation in cats, specifically focusing on a 17-pound cat.

What is Miralax?

Miralax is an over-the-counter medication primarily used to treat occasional constipation in humans. The ingredient, polyethylene glycol, is an osmotic laxative. It works by retaining water in the stool, softening it, and increasing the number of bowel movements. This mechanism is gentle and doesn’t stimulate the bowel suddenly, which makes it a preferred choice for cats.

Why Miralax for Cats?

Cats, especially as they age, can become prone to constipation. Various factors contribute to this condition in cats, including dehydration, hairballs, dietary issues, or underlying medical conditions like kidney disease or hypothyroidism.

When traditional nutritional changes or other interventions don’t relieve constipation, veterinarians often recommend Miralax due to its effectiveness and relative safety.

Dosage and Administration

The correct dosage of Miralax for a 17-pound cat is crucial. Typically, the dose ranges from 1/8 to 1/4 teaspoons mixed in with the cat’s food once or twice daily. However, this dosage can vary according to the cat’s health status, age, and other factors.

It is essential to consult with a veterinarian before administering Miralax. They will consider the cat’s overall health, the severity of the constipation, and any other medications the cat might be taking.

Precautions and Side Effects

While Miralax is generally safe for cats, there are precautions and potential side effects. Overdosing can lead to diarrhea, dehydration, and electrolyte imbalance.

Long-term use is not recommended without veterinary supervision, as it might mask underlying health issues. Side effects, although rare, can include bloating, gas, and discomfort.

Importance of Veterinary Consultation

Before starting any treatment, including Miralax, it is imperative to consult a veterinarian. Vets can diagnose and rule out severe conditions that might be causing constipation, such as intestinal blockages or chronic diseases. A veterinarian will also guide the duration of treatment with Miralax, as prolonged use without medical advice is not advisable.

Monitoring and Adjustments

Once Miralax treatment starts, closely monitoring the cat’s bowel movements and overall health is essential. If there’s no improvement in the cat’s condition, or if side effects occur, contact the veterinarian. They may adjust the dosage or another treatment.

Dietary Considerations

Along with medication, dietary management is critical in treating and preventing constipation in cats. Increasing fiber intake, ensuring adequate hydration, and providing a balanced diet are essential. Sometimes, switching to a wet food diet or adding pumpkin or other fiber-rich supplements can be beneficial.

Alternative Treatments

There are alternatives if Miralax is unsuitable or a cat owner prefers a more natural approach. Pumpkin puree (not pumpkin pie filling), wheat bran, and specially formulated feline probiotics can help regulate bowel movements. However, these should also be used under veterinary guidance.

Long-term Management

For cats that suffer from chronic constipation, long-term management strategies are necessary. This includes regular veterinary check-ups, dietary management, adequate exercise, and monitoring for any signs of gastrointestinal distress.


Miralax can effectively treat constipation in cats, especially for cats weighing around 17 pounds. However, a veterinarian must guide its use to ensure it’s safe and effective for the cat’s needs.

Alongside medication, dietary changes and regular veterinary care are crucial in managing a cat’s digestive health. By understanding the proper use of Miralax and taking a holistic approach to a cat’s health, cat owners can help ensure their friends lead comfortable, healthy lives.