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Felimazole (Methimazole)

Prescription medicineOnly Available By Prescription

Top brand choice

Strength Pack Size Qty
2.5mg For Cats
Pack Size

You'll have option to make 4 interest-free payments by credit card once your order is confirmed using

What if I find a lower price with another pharmacy?

We guarantee the lowest price on all of our prescription products. If you find your medications cheaper at any other recognized licensed mail order pharmacy, we will not only match their price, we will beat it by 25% of the difference. It is our 125% price match guarantee!

Example: If you find a product on Canada Drugs Direct for $50.00 and find the same product for $40.00 at another mail order pharmacy, we will provide you with a $12.50 discount, bringing your total to $37.50.

To get the discount please make sure to mention the price match to the customer service team when they call to collect payment for your order. Or call toll free at 1-888-904-8467 to place the order through the phone.

Terms & Conditions of Program

  • Guaranteed lowest price is only valid at the time of sale.
  • We will only match the current advertised price.
  • Products must be identical and in stock at the time of placing an order with a licensed mail order pharmacy. They must be an online Canadian pharmacy with an address in Canada.
  • Products must be authentic in brand and size (same manufacturer, same country of manufacture, same pack size, same strength and same quantity).
  • Products must be new. We cannot match the price of any used, short expiry or expired product.
  • Price match can only be issued over the phone with our customer service team. Please note at this time we cannot offer price matching for the products Ozempic or Saxenda.
What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


Felimazole is a prescription hyperthyroidism medication for cats that works to inhibit the synthesis of thyroid hormone so less T3 and T4 hormone are secreted by the thyroid gland. Treatment with the medication eliminates the risk of poor cardiovascular health for cats resulting from untreated hyperthyroidism plus relief of increased thirst, frequent urination, or any of the other cat hyperthyroidism symptoms seen. Within 3 weeks to 1 month of your pet starting on Felimazole for cats you can expect to see improvements, and this medication is ideal for cat hyperthyroidism treatment.

You can buy Felimazole with a prescription, and your best price on it will be when you order pet medication online from Canada Drugs Direct.


Standard starting dosage for Felimazole is 2.5mg given orally every 12 hours. After 3 weeks of treatment and based on your vet's observations your pet's dose may be titrated based on T4 hormone concentrations.

Do not break or crush tablets


The active ingredient in Felimazole is Methimazole


Cats with a history of liver disease or renal failure may not be eligible to use Felimazole

Methimazole is not for use with cats that have autoimmune disease

Let your veterinarian know if your cat has any history of diabetes before starting on Felimazole


Negative drug interactions between Felimazole and other pet Rx medications are a possibility, and including with other similar drugs containing carbimazole. Let your veterinarian know of all medications your cat is currently taking before getting a prescription and proceeding to buy Felimazole online.

Side Effects

Felimazole side effects are uncommon, but some cats may experience appetite loss, vomiting, or lethargy. In rare cases jaundice may occur. If Felimazole side effects are seen you may want to discontinue use and talk to your vet again regarding cat hyperthyroid treatment alternatives.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

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