Customer Service | Call us at (800) 710-9770 9:30 - 7 est M-F | Email Us at HOW WILL WE GET YOUR PRESCRIPTION? > Allopurinol


Clear Attribute Filter
Products 1-4 of 4
Allopurinol 100 mg, 100 Tablets
Price: $22.63
Item #: 1014024 -
Availability: Rx Required
Allopurinol 100 mg, 30 Tablets
Price: $6.91
Item #: 1040306 -
Availability: Rx Required
Allopurinol 300 mg, 100 Tablets
Price: $43.26
Item #: 1014025 -
Availability: Rx Required
Allopurinol 300 mg, 30 Tablets
Price: $13.29
Item #: 1040307 -
Availability: Rx Required

Products 1-4 of 4

Kidney Stone and Bladder Stone Pet Medications

Allopurinol is a prescription pet medication that is used to decrease the formation of bladder and kidney stones in dogs and cats caused by high concentrations of uric acid.

Allopurinol prevents development of bladder and kidney stones and associated symptoms, including blood in the urine, urinary tract infections, painful urination, vomiting, and frequent urination. The medication is generally well tolerated and works quickly. Allopurinol is a short-term treatment and is not a cure for the underlying cause of stones.

Benefits of Allopurinol:

  • Prevents urate bladder stones from recurring
  • Dissolves some existing stones
  • Especially beneficial to dog breeds prone to blow flow issues
  • May help eliminate Leishmania and Tryansomiasis in dogs

Use this medication only as directed by your veterinarian.

For best results, use this medication in conjunction with a diet low in purines.

Only give this medication to the pet for which it was prescribed.


  1. Give Allopurinol with meals, by mouth.
  2. Administer dogs 5 mg/lb of body of body weight once daily.
  3. Consult your veterinarian about the correct dosage amounts for cats and/or other animals.
  4. Make plenty of drinking water available during treatment with Allopurinol.

Frequency of Use:

Give Allopurinol once daily for the prescribed period. Bladder stones may take weeks or months to dissolve. The medication is not a cure for the underlying cause of stones and is not usually given long-term.


Store Allopurinol at room temperature, away from heat and moisture. Keep out of reach of pets and children.

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Allopurinol belongs to a class of medications called xanthine oxidase inhibitors. These medications prevent accumulation of uric acid in the body, thereby preventing the formation of crystals and stones in the urine. Allopurinol is not FDA-approved for use in animals; however, it is commonly prescribed by veterinarians for this purpose.


Keep Allopurinol out of reach of children and animals. Do not use or store in or near open flame or heat.

Allopurinol is intended for use in adult dogs only. Do not use in puppies, kittens, or cats unless specifically told to do so by your veterinarian. Not for human use or for giving to other animals.

CAUTION: Do not give this medication to pregnant or nursing dogs or to puppies.

This medication may cause drowsiness in some animals. Other side effects may include dizziness, diarrhea, or acute arthritis.

Allopurinol may cause upset stomach. Giving with food reduces the incidence of this side effect.

Immediately stop giving this medication and seek veterinary care if an allergic reaction develops or if your pet develops bloody urine, rash, fever, joint aches, severe nausea, chills, or eye irritation.

Using this medication at the same time as amoxicillin or ampicillin may cause a rash to develop.

Some drugs may interact with Allopurinol. Tell your veterinarian about any over-the-counter or prescription supplements or medications your pet is taking before beginning therapy with this medication.

Do not use this medication in animals with a known allergy to it or to similar medications.