Hover image to zoom Tap and hold image to zoom
Refills on File
Your pet {{refill.petName}} has {{refill.refillsRemaining}} refill{{refill.refillsRemaining>1?'s':''}} for ‘{{refill.options}}’ which will expire on {{refill.expiresOn}}.
{{refill.petName}}'s refills for this have expired on {{refill.expiresOn}}
At a Glance
Treats hyperthyroidism in cats
Used as pre-thyroid surgery treatment
Rapid results


List Price:
{{list_price * quantity | currency}}
List Price:
{{list_price * quantity | currency}} {{(list_price + 0.01) * quantity | currency}}
List Price:
{{list_price * quantity | currency}}
List Price:
See price in cart
PetPlus Price:
{{petplus_price * quantity |currency}}
PetPlus Price:
See price in cart
Sale Price:
{{sale_price * quantity|currency}}w/code {{siteCode}}
Your Price:
{{map_price + 0.01 | currency}} See price in cart w/code {{siteCode}}
{{petplus_savings_amount * quantity|currency}} ({{petplus_savings_percent}}%)
{{coupon_savings_amount * quantity|currency}} ({{coupon_savings_percent}}%)
Join PetPlus today and get this for {{intro_price_total|currency}}
Join PetPlus today and {{use_strict_map_rules?"see price in cart":"get this for a special price"}}

inlowout of stock
Get notified as soon as this becomes available
Thank you.
We will email {{notifyEmail}} when this is back in stock.
Recommended Alternatives:
Limit ( {{ selected_sku_data.cartLimit }} ) per customer. Orders for more than this may not be fulfilled.
Shipping is always free with PetPlus | Arrives in 1-3 days
Free shipping over $48* | Arrives in 1-3 days
Select Autoship options at checkout
At a Glance
Treats hyperthyroidism in cats
Used as pre-thyroid surgery treatment
Rapid results

Hyperthyroidism is a condition in which the thyroid gland produces too much thyroid hormone. Tapazole works to suppress the amount of thyroid hormone produced. In some instances, Tapazole is prescribed as a preparatory treatment for thyroid surgery or radioactive iodine therapy. This drug can also be used to treat Graves Disease.

If your cat suffers from hyperthyroidism, speak with your veterinarian today. After performing blood tests to determine the proper dosage for your pet, your veterinarian can prescribe Tapazole. Routine blood work will need to be performed. For more information, speak with your veterinarian or pharmacist.

An effective and affordable generic alternative to Tapazole is Methimazole.


Tapazole treatment is associated with side effects including nausea, vomiting, lethargy, lack of appetite, arthraglia, lymphadenopathy, loss of taste, hair loss, skin rash, urticaria, and drug fever. In rare instances, serious side effects like agranulocytosis, leukopenia, thrombocytopenia, aplastic anemia and hepatitis are observed. Long-term usage may result in prolonged blood clotting durations, kidney and liver damage, and reduced white blood cell counts.


Side effects are extremely rare (under 5%) but can be dangerous. Contact a veterinarian if your pet exhibits a sore throat or excessive bleeding. Liver failure has also been reported in rare cases. Other side effects include lack of appetite, vomiting, rash, hives, itching, edema and drowsiness.

Do not use the medication in cats with allergy to Tapazole, liver disease, autoimmune disease or blood abnormalities. The medication is not suitable for use in pregnant or nursing animals. The treatment/medication is required for life. The symptoms will reappear on discontinuing the medication.

Tapazole is an anti-thyroid medication used for the treatment of hyperthyroidism (overactive thyroid gland) in cats. However, the medication is not FDA approved for use in veterinary medicine. It is also used to ameliorate hyperthyroidism in preparation for subtotal thyroidectomy or for radioactive iodine therapy. Tapazole is used for the treatments where thyroidectomy is contraindicated or not advisable. Tapazole inhibits the formation of thyroid hormone by interacting with iodine.

Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427.

This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian. Always seek the advice of your veterinarian or other qualified professional with any questions you may have regarding a medical condition. Never disregard or delay seeking professional advice due to what you may have read on our website. Our medications are FDA approved and/or EPA regulated when and as required by law.

The medication is available by prescription as tablets. The standard dosage is 5 mg/cat every 8 โ€“ 12 hours. In adults, the dosage is 15 mg for mild hyperthyroidism, 30 โ€“ 40 mg for moderately severe condition and 60 mg for chronic hyperthyroidism. Make sure to give 3 equal dosages at approximately 8 hour intervals. Repeat blood tests every 3 โ€“ 4 weeks until the maintenance dose is reached, and then frequency of blood testing can be set to 3 โ€“ 6 months. The maintenance dosage is ยฝ of the initial dosage.

Give this medication as prescribed by your pet's veterinarian. This drug can be given with or without food, but be sure to allow your cat plenty of drinking water.

Store at room temperature away from moisture and heat.

Tapazole is manufactured by King Pharma
Option UPC/SKU
5mg per tablet 360793104010

How to Order Prescriptions Online

1. Find the Right Product

Make sure it matches your pets prescription. Donโ€™t forget to compare the dosage for pills/capsules!

2. Add to Cart

Just like any other online store. Make sure the quantity matches whatโ€™s been prescribed by your vetinarian.

3. Tell Us About Your Pet and Vet

Answer some questions during checkout and weโ€™ll contact your vet and verify the prescription for you. You can also mail us the written prescription.

4. Thatโ€™s It!

If the prescription has any refills, processing your future orders for that medication can be expedited.

Customers Also Bought These Items

Related Articles

Pet Meds For Hyperthyroidism In Cats

How The Medication To Restore Thyroid Levels Works

Read More

Customer Reviews

Overall Rating

4 / 5
* = required

New Product Review

Uploaded Image 1
Uploaded Image 2
Uploaded Image 3
  • {{error}}
Showing 1 - {{visible_reviews.length}} of 1

This product has no reviews yet. Write a review.

Page 1 of 1 1