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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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We currently methimazole in 100 mg/ml Twist-a-Dose tubes The tubes say methimazole5 mg/ 0.05 ml in lipoderm 2 full pen rotations delivers 0.05ml of gel If I order your Methimazole 100mg/ml 1ml Transdermal what will our cats dosage be?

Asked by: RooCat
You would want to take the same 0.05ml of the product. Consult with your veterinarian about any changes in your dogs regimen. If you need help findings way to measure and administer 0.05ml without a pen, call our pharmacy team at 1-888-738-6331.
Answered by: Ben B
Date published: 2017-03-13

My cat was prescribed 0.05 ML twice. Day of Transdermal methimazole 10mg. What would the dose be for methimazole 50mg?

Asked by: Jess
Hello Jess, We do make a 50mg/ml transdermal methimazole. So this would be 1ml to get the 50mg dose. If that is what you are asking? You can see all of our methimazole products and dosing there on the info page. If you still have trouble, I would ask your Vet for the best option. Hope this helps. Thanks
Answered by: Trey W
Date published: 2017-03-09

My cat is prescribed 2.5 mg., twice a day. With the 50mg gel in 1ml syringe, would that be .5ml, twice a day? Thank you!

Asked by: Cheryl61
If the medication bottle says 5mg/ml then yes you would want to use 0.5ml twice a day.
Answered by: Ben B
Date published: 2017-02-21

Do you ship methimazole transdermal gel 50mg/ml to the United Kingdom. If so how much would the shipping cost?

Asked by: Farooq
Yes, we can ship that item to the UK. Shipping cost will range from $4-10 depending on the option you choose. Shipping is free from PetMeds for any order over $39. Hope this helps.
Answered by: Trey W
Date published: 2017-02-21

I'm trying to understand why when I order from a compounding pharmacy locally I get 12 syringes for 70.00 and when I ordered from 1800petmeds I only got 3 syringes (same size 1 ml) for 51.80 (normally 60.00)? Was my order processed incorrectly?

Asked by: Heidi 62
Hello Heidi, This could be based on what strength you needed for your pet and the difference between the companies or on how many total mL you ordered. If you feel like it is wrong, you can contact our customer service department at 1-800-738-6337. Hope this helps.
Answered by: Trey W
Date published: 2017-02-21

I believe I'm getting 10 mg per ml for my cat. I'm seeing you have 5. Do you have 10 or would I double the dose?

Asked by: Joanne
Hello Joanne, We do not have 10mg doses for the liquid product, so you could use 2 ml to get the 10mg dose. Before doing this I would talk to your veterinarian first. Thanks for asking, Pharmacy Intern
Answered by: Ben B
Date published: 2017-02-16

The Methimazole Compounded that gets rubbed in the ear. How many doses are in a bottle? Squirt on inside of ear and rub it in? How do you deal with prescription? Do we get one and mail it in? Email? You call the Vet?

Asked by: Peter
The number of doses would depend on the actual dose that the pet would require and which compounded medication is prescribed. We will send the fax to the veterinarian and in some cases call the veterinarian's office to get your medication approved if you place an order with our pharmacy online or by telephone. Your veterinarian can also call the prescription in after the exam so that the approval is quick and we can send you the medication right away. If you have any more questions about prescription medication or for help with placing your order please call our pharmacy at 561-526-4444 or 888-738-6331.
Answered by: 1800Petmeds Pharmacist
Date published: 2017-01-12

Does your methimazole transdermal gel come in a twist a dose dispenser that gets rubbed in the ear? Thanks

Asked by: DMJ3
No our product is compounded into a syringe not a twist pen.
Answered by: S Duesler PharmD MBA
Date published: 2016-11-17
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