Dulcolax® for Dogs and Cats

Bisacodyl is commonly known as Dulcolax® and is used as a laxative to treat constipation for dogs and cats.

Bisacodyl belongs to the class of drugs known as stimulant laxatives. The exact way bisacodyl works is still unknown. Bisacodyl is available without a prescription but should not be administered unless under the supervision and guidance of a veterinarian. This drug is not approved for use in animals by the Food and Drug Administration, but it is prescribed legally by veterinarians as an extra-label drug.

Brand Names for Bisacodyl

This drug is registered for use in humans only.

• Human formulations: Dulcolax® (Ciba), Bisco-Lax® (Schein), Fleet® Bisacodyl (Fleet), Carter’s Little Pills® (Carter), and various generic preparations
• Veterinary formulations: None

Signs of Constipation in Dogs and Cats

Recognizing the signs of constipation in your pet is the first step toward getting them the relief they need. Constipation occurs when a dog or cat is unable to pass stool normally, either due to dryness, blockage, or a slowdown in intestinal movement. While it’s not uncommon for a pet to occasionally skip a bowel movement, ongoing or recurring issues should be taken seriously.

Common signs of constipation in dogs include:

• Straining or crouching to defecate with little or no result
• Passing hard, dry, or pebble-like stools
• Reduced frequency of bowel movements
• Signs of abdominal discomfort or bloating
• Loss of appetite or lethargy

In cats, signs of constipation may include:

• Frequent, unproductive trips to the litter box
• Small, dry, or hard feces (sometimes found outside the litter box)
• Crying or vocalizing while trying to defecate
• Licking around the anal area more than usual
• Hiding, acting irritable, or avoiding the litter box altogether

If you notice these symptoms lasting more than a day or two, or if your pet seems uncomfortable or in pain, consult your veterinarian. Early treatment can prevent complications like megacolon or impaction, especially in cats.

Uses of Dulcolax for Cats and Dogs

• Bisacodyl is used to stimulate bowel movements in animals with constipation or when there is a need to empty the large intestine.

Can Dogs Take Dulcolax for Constipation?

Dulcolax is occasionally used off-label by veterinarians to relieve constipation in dogs, but it should never be given without professional guidance. While the drug stimulates bowel movements by increasing intestinal activity, it can also cause abdominal cramping, dehydration, or diarrhea if dosed improperly.

There are safer and more commonly recommended options for canine constipation, including dietary changes, hydration support, or veterinary-prescribed stool softeners or laxatives. Dulcolax may be used in rare cases when other methods have failed, but only under veterinarian supervision, and never for prolonged periods.

If your dog is showing signs of constipation (straining, passing small or hard stools, or having fewer bowel movements than usual), consult your veterinarian for the safest treatment plan.

Potential Side Effects of Bisacodyl for Pets

While generally safe and effective when prescribed by a veterinarian, bisacodyl can cause side effects in some animals. These include diarrhea, cramping, and nausea.

Bisacodyl should not be used in animals with known hypersensitivity or allergy to the drug. Animals with gastrointestinal obstructions, rectal bleeding, or intestinal tears should also avoid bisacodyl.

Dulcolax Dosage for Dogs and Cats

For dogs, the dose varies between 1 to 4 tablets once daily, 1 to 2 milliliters of the enema solution given as an enema, or 1 to 3 pediatric suppositories placed in the rectum. For cats, the dose is one 5 milligram tablet once daily, 1 to 2 milliliters of the enema solution given as an enema, or 1 to 3 pediatric suppositories placed in the rectum.

The duration of administration depends on the condition being treated, response to the medication, and the development of any adverse effects. Be certain to complete the prescription unless specifically directed by your veterinarian. Even if your pet feels better, the entire treatment plan should be completed to prevent relapse.

Medication should never be administered without first consulting your veterinarian. If you're concerned about costs related to medication, pet insurance may be able to help. Click here to learn more.