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Methimazole Compounded

Rx Info
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2. We verify your prescription and ship your order!
Starts $19.99 $14.39 
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Methimazole 5mg/ml 15ml Liq.
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Methimazole 5mg/ml 30ml Liq.
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Methimazole 5mg/ml 60ml Liq.
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Methimazole 5mg/ml 90ml Liq.
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Methimazole 5mg/ml 120ml Liq.
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Methimazole 5mg Chewtab 30 Tabs
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Methimazole 5mg Chewtab 90 Tabs
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Methimazole 10mg Chewtab 30 Tabs
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Methimazole 10mg Chewtab 90 Tabs
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Methimazole 50mg/ml 1ml Transdermal
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Methimazole 100mg/ml 1ml Transdermal
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Product Info
How to Use
What is a compounded medication?
Customer Reviews
Product Info
What is Methimazole Compounded?

Methimazole is used to treat hyperthyroidism in cats. It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects. Compounding is beneficial in instances where a specific dosage is unavailable or in different forms to make it easier to dose your pet. Methimazole requires a prescription from your veterinarian.

Visit Methimazole for regular 5 Mg tablets.



  • Effectively treats hyperthyroidism in cats
  • Rapid results
How it Works:

Hyperthyroidism is a condition that occurs when the thyroid gland produces too much thyroid hormone. Methimazole inhibits the production of thyroid hormones.


Blood tests must be done to check for proper dosage. Do not use in pregnant or nursing animals. Do not give your pet a live vaccine while giving methimazole. Contact your veterinarian immediately if your pet develops signs of an infection.

How to Use
  • Methimazole is a prescription medication used by veterinarians to treat overactive (hyper) thyroid in cats.
  • Methimazole is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to prescribe this medication for cats.
  • Methimazole is also used before thyroid surgery or radioactive iodine treatment.
  • Periodic blood tests will be necessary while your cat is taking this medication.

Do not use in pregnant or nursing animals. Methimazole can be given with or without food.

What is a compounded medication?
What is a Compounded Medication?

A compounded medication is the creation of a particular medication to fit the unique needs of a patient, including changing the form of the medication (e.g., from a solid pill to a liquid) for a variety reasons (e.g., to make it easier to take, to avoid a non-essential ingredient, to obtain the exact dose needed, adding favorite flavors).

If you are having difficulty giving your pet prescribed medication or need to find a discontinued medication, 1-800-PetMeds offers compounding services on select medications. We can prepare the following: (1) custom strength quantities of a medication (as capsules, liquid, chewable tablets, or transdermal (absorbed through the skin); (2) dosage forms to mask bitter or unpleasant taste (such as capsules or chewable tablets that can also be flavored); (3) dosage forms to make it easier to dose your pet such as a transdermal or liquid (that can also be flavored); and (4) discontinued products such as cisapride or DES.

Customer Reviews
Methimazole Compounded is rated 4.2 out of 5 by 5.
Rated 5 out of 5 by from Oral Thyroid Meds I just placed my 2nd order for 180 Edible Methimazole 10mg compounded. Great product. My cat, Magic, age 17, loves them. I give him 2/day for a total of 20mg/day. I previously used 5mg oral pills and had to pry open his mouth and drop them in. The oral version is great. Magic looks forward to taking his meds and want more!!
Date published: 2016-07-16
Rated 5 out of 5 by from A miracle for cat meds It was pure torture to get my lovely kitty to take a pill and because of tooth decay, she couldn't handle the pill wraps. Then came this transdermal hyperthyroid medication--you just shoot a small amount out of a plastic syringe right on to the inside of tehear where there is no hair.....and that's it. The cat gets her meds and an ear rub and both she and I are happy. By the way--PetMeds is one third the price of a local pharmacy for this compounded medication--can't beat it!
Date published: 2016-03-29
Rated 5 out of 5 by from The only chewable medication my cat will eat! My cat developed thyroid problems after he turned 10 years old and he had lost a lot of weight. He won't take pills and he didn't like the first chewable medication that the Vet ordered. This is the only medication that he will eat and he takes it twice a day. He has gained weight and is doing better. We are very happy customers.
Date published: 2015-09-16
Rated 5 out of 5 by from It saved my cat's life!!!!! Without the chewable compounding, my cat wouldn't be alive! This is a treat for my cat, not the struggle of trying to get a pill down her throat, hiding the pill and hoping she will eat it, crushing it up into anything she will eat, you know the unsuccessful drills. Cat owners know the horrors of your pet being on twice a day medication and she won't have anything to do with the pill. She's not a dog who will eat anything. I'm a five year chewable customer who is 100% satisfied.
Date published: 2015-05-28
Rated 1 out of 5 by from not for cats I believe a dog would eat these "treats" up quickly, but they are not for cats. The compounded pill for a 5mg is about 1/2 inch and can be flavored (like chicken is made with chicken broth). The problem is that the consistency of the pill feels and will chew like a piece of plastic. It is so hard, you need a knife to cut it. Anyway, my cat licked it a couple of times but wouldnt eat it. If they were made much softer, a cat might go for it.
Date published: 2013-06-11
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is there a flavored methimazole chew tab

Asked by: dirk
Yes, our compound Pharmacy can add a flavor to the medication. Please let us know at the time of your order and we will do our best to accommodate.
Answered by: Pharmacy Manager
Date published: 2016-01-21

Can I give my cat methimazole gel mixed with food instead of transdermally?

Asked by: Coco
No, the transdermal medication is not for oral use. It should only be used transdermal as directed.
Answered by: Kelly P
Date published: 2015-07-30

Does PetMeds sell methimazole transdermal?

I have a liquid that I put in my cat's ear. Does 1800PetMeds sell this. My cat will not take pill form.
Asked by: Jeanne
Thank you for your question. Yes, we sell the Methimazole in transdermal form.
Answered by: Maureen PetMeds Pro
Date published: 2015-03-30

My 10 yr old cat is taking 4 medications, including methimazole 5mg...

She also must take Atenolol 25 mg, Enalapril 2.5 mg, and Hydrochlorothiazide 25 mg. It is very difficult for us to give her the meds without a huge struggle. She has am & pm doses and a bad heart - would like to keep things calmer. Are any of the meds besides Methimazole available in a topical form? If yes, how would these best be applied to ensure she gets proper dosing? (It seems the inside area of the ear is the best place, but how would we sequence the application?) Thank you.
Asked by: Maggie
We do carry Atenolol and Enalapril in transdermal forms through our compounding pharmacy, however not in the strengths you mentioned above. Please contact a local compounding pharmacy in your area that may be able to compound the medications your pet needs in a transdermal dosage form.
Answered by: Stephanie Duesler, Pharm. D, MBA
Date published: 2014-09-13

My prescription is for Felimazole. How is this different from Methimazole? Is it just the coating?

Asked by: Pat
it is just the coating
Answered by: Linda M 1800petmeds pharmacist
Date published: 2014-05-31

My cat's Rx is for 10 mg of Methimazole 2x/day.

Can you compound this strength? Our previous vet got it for us in an easy to dispense pen form so the syringe method is new to us. Also, how much would the 10 mg syringes cost?
Asked by: K Raiman
please call our pharmacy department and we will be happy to tell you about our compounded transdermal methimazole and the options you have.
Answered by: Linda M 1800petmeds pharmacist
Date published: 2013-09-10

How long can methimazole be kept refrigerated before expiring.

Asked by: cateyes
The expiration date will be indicated on the label, it depends on the dosage form of the methimazole.
Answered by: Janine M./Pharmacist
Date published: 2013-08-14

If the prescription is transdermal gel of methomazole at 50mg/1ml to be administered once a day what exactly does your single order consist of?

ie how many doses at one a day does each order contain? Is it enough for 10 days, 20 days or what period? Does each order come with everything you need to administer the given number of doses that each order covers ie is there a separate syringe for each day or does it come all loaded in one syringe which is then good for 10, 20 or 30 days of individual doses? It is very unclear at 50mg/1ml to be given once a day exactly what you get by requesting one order. If you could be a bit more specific it would be appreciated. Thank you. Ken in Seattle.
Asked by: Seattle
Ken, please call our pharmacy at 1-888-738-6331 and provide the dose your cat gets of methimazole per day....and we can tell you exactly how long a 50mg/1ml will last. For example, if a cat is getting 5mg per day..........There are 10 doses...or a 10 days supplt in the 1 ml syringe. Typically, a customer will order 3 syringes of the 50mg/ml to have enough for a one month supply. The most you can order would be a 90 day supply because the gel is only stable for a 90 day period after being compounded.
Answered by: Linda M 1800petmeds pharmacist
Date published: 2013-07-31
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