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Methimazole

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About this product

What is Methimazole?

Methimazole is used to treat hyperthyroidism in cats. Methimazole is used to treat overactive thyroid (hyperthyroidism). It is also used before thyroid surgery or radioactive iodine treatment. It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects. Methimazole requires a prescription from your veterinarian, and is sold per tablet.

For:

Cats

Benefits:

  • Effectively treats hyperthyroidism in cats
  • Rapid results
  • Affordably sold per tablet

How does Methimazole work?

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

Cautions:

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.

Brand Name:

Tapazole (Jones)

Generic Name:

Methimazole

What should I discuss with my veterinarian before giving Methimazole to my pet:

Tell your veterinarian if your pet has an allergy to methimazole or if your pet has liver disease, a blood cell disorder, or a weak immune system. Tell your veterinarian if the pet is pregnant or nursing. Inform your veterinarian of any other medications, including vitamins and supplements your pet may be taking while receiving methimazole.

What is the most important information I should know about Methimazole?

Methimazole is a prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in cats. Methimazole is available as a 5mg scored tablet. The usual initial dose for cats is 5mg every 8 to 12 hours. Do not give methimazole to pregnant or nursing animals. Methimazole can increase the risk of bleeding. Methimazole can lower the blood cells that help fight infections. Your veterinarian will need to give blood tests on a regular basis to be sure these blood cells do not get too low. Do not give the pet a "live" vaccine while the pet is taking methimazole. Methimazole is needed for the life of the pet. If the medication is stopped, the symptoms will reappear.

How should Methimazole be given?

Give this medication exactly as directed by your veterinarian. Do not give in larger amounts, or give it for longer than recommended by your veterinarian. Follow the directions on the prescription label. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Methimazole can be given with or without food. Allow plenty of water for the pet to drink. Store methimazole at room temperature away from moisture and heat. Keep this medication away from children and pets.

What are the possible side effects of Methimazole?

If any of the following serious side effects occur, stop giving methimazole and seek emergency veterinary medical attention; an allergic reaction (difficulty breathing; swelling of the lips; tongue or face; hives). Stop giving methimazole and contact your veterinarian at once if your pet develops any of these serious side effects; fever, chills, body aches; easy bruising or bleeding, unusual weakness; blood in the urine or stools; severe blistering, peeling, and skin rash; nausea, low fever, loss of appetite, dark urine, jaundice. Other less serious side effects may occur. Continue giving methimazole and talk to your veterinarian if your pet experiences headache, drowsiness, dizziness; mild nausea, or vomiting; itching; muscle, joint, or nerve pain; swelling; hair loss. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to the animal.

What happens if I miss giving a dose of Methimazole?

Give the missed dose as soon as you remember during the same day. However, if you don't remember until the next day, skip the dose you missed and give only the next regularly scheduled dose. Do not give a double dose of the medication.

What should I avoid while giving Methimazole to my pet?

Do not give the pet a "live" vaccine while the pet is taking methimazole. Contact your veterinarian at once if your pet develops signs of an infection.

What other drugs will affect Methimazole?

Tell your veterinarian if your pet is taking theophylline (Theo-Dur), warfarin (Coumadin), digoxin (Lanoxin), a beta blocker such as atenolol (Tenormin), metoprolol (Lopressor), or propranolol (Inderal). Drugs other than those listed may also interact with Methimazole. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines.

See more

Methimazole Directions:

  • 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 the cat is taking this medication.
Tip:

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

Methimazole Dosage for Cats:

Cats:
WeightDosage
All weightsThe usual initial dose varies from 2.5-5mg 2 or 3 times a day. Periodic blood testing is required to monitor liver function and for any toxic effects on blood cells
Methimazole Dosage for Dogs:
Dogs
Do not use!
Methimazole Dosage for Horses:
Horses
Do not use!
Storage:

Store methimazole at room temperature, away from moisture and heat.

Methimazole Ingredients:

Methimazole
Active Ingredients (per tablet)Amount
Methimazole5 mg
Other Ingredients: Lactose Monohydrate, Povidone, Talc, Croscarmellose Sodium, Magnesium Stearate, Corn Starch.
Product Details
plus minus

What is Methimazole?

Methimazole is used to treat hyperthyroidism in cats. Methimazole is used to treat overactive thyroid (hyperthyroidism). It is also used before thyroid surgery or radioactive iodine treatment. It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects. Methimazole requires a prescription from your veterinarian, and is sold per tablet.

For:

Cats

Benefits:

  • Effectively treats hyperthyroidism in cats
  • Rapid results
  • Affordably sold per tablet

How does Methimazole work?

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

Cautions:

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.

Brand Name:

Tapazole (Jones)

Generic Name:

Methimazole

What should I discuss with my veterinarian before giving Methimazole to my pet:

Tell your veterinarian if your pet has an allergy to methimazole or if your pet has liver disease, a blood cell disorder, or a weak immune system. Tell your veterinarian if the pet is pregnant or nursing. Inform your veterinarian of any other medications, including vitamins and supplements your pet may be taking while receiving methimazole.

What is the most important information I should know about Methimazole?

Methimazole is a prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in cats. Methimazole is available as a 5mg scored tablet. The usual initial dose for cats is 5mg every 8 to 12 hours. Do not give methimazole to pregnant or nursing animals. Methimazole can increase the risk of bleeding. Methimazole can lower the blood cells that help fight infections. Your veterinarian will need to give blood tests on a regular basis to be sure these blood cells do not get too low. Do not give the pet a "live" vaccine while the pet is taking methimazole. Methimazole is needed for the life of the pet. If the medication is stopped, the symptoms will reappear.

How should Methimazole be given?

Give this medication exactly as directed by your veterinarian. Do not give in larger amounts, or give it for longer than recommended by your veterinarian. Follow the directions on the prescription label. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Methimazole can be given with or without food. Allow plenty of water for the pet to drink. Store methimazole at room temperature away from moisture and heat. Keep this medication away from children and pets.

What are the possible side effects of Methimazole?

If any of the following serious side effects occur, stop giving methimazole and seek emergency veterinary medical attention; an allergic reaction (difficulty breathing; swelling of the lips; tongue or face; hives). Stop giving methimazole and contact your veterinarian at once if your pet develops any of these serious side effects; fever, chills, body aches; easy bruising or bleeding, unusual weakness; blood in the urine or stools; severe blistering, peeling, and skin rash; nausea, low fever, loss of appetite, dark urine, jaundice. Other less serious side effects may occur. Continue giving methimazole and talk to your veterinarian if your pet experiences headache, drowsiness, dizziness; mild nausea, or vomiting; itching; muscle, joint, or nerve pain; swelling; hair loss. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to the animal.

What happens if I miss giving a dose of Methimazole?

Give the missed dose as soon as you remember during the same day. However, if you don't remember until the next day, skip the dose you missed and give only the next regularly scheduled dose. Do not give a double dose of the medication.

What should I avoid while giving Methimazole to my pet?

Do not give the pet a "live" vaccine while the pet is taking methimazole. Contact your veterinarian at once if your pet develops signs of an infection.

What other drugs will affect Methimazole?

Tell your veterinarian if your pet is taking theophylline (Theo-Dur), warfarin (Coumadin), digoxin (Lanoxin), a beta blocker such as atenolol (Tenormin), metoprolol (Lopressor), or propranolol (Inderal). Drugs other than those listed may also interact with Methimazole. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines.

See more
How to use
plus minus

Methimazole Directions:

  • 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 the cat is taking this medication.
Tip:

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

Methimazole Dosage for Cats:

Cats:
WeightDosage
All weightsThe usual initial dose varies from 2.5-5mg 2 or 3 times a day. Periodic blood testing is required to monitor liver function and for any toxic effects on blood cells
Methimazole Dosage for Dogs:
Dogs
Do not use!
Methimazole Dosage for Horses:
Horses
Do not use!
Storage:

Store methimazole at room temperature, away from moisture and heat.

Ingredients
plus minus

Methimazole Ingredients:

Methimazole
Active Ingredients (per tablet)Amount
Methimazole5 mg
Other Ingredients: Lactose Monohydrate, Povidone, Talc, Croscarmellose Sodium, Magnesium Stearate, Corn Starch.
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Smittytoo1205
1 year ago
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Breed Siamese
Best Medicine for my Baby
My cat Heather Spring has been on this medicine for about 5 yrs now and is doing great. She is maintaining her weight and eating better.
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Jules
1 year ago
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Breed Domestic Shorthair
Same Effective Med at Lower Price
This med works wonders for my 15.year old cat, and I can get it here for a fraction what the vet charges for for it. So convenient to have refills automatically delivered to my home, too.
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Coco chanel
1 year ago
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Breed Short hair tortie
I have been with pet med for almost eight years. The cat food and treats are less than Chewie. I am almost 70 and coco is 15 years old. We recently found she has a thyroid problem. The spca wanted over 50.00 for methimazole. I get is for 25.00. Thank you
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Cee Cee
1 year ago
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Cost transparency
PetMeds ships 2 medications for my pets. The cost direct from the veterinarian office is $92.00. The cost from PetMeds is 0.11 cents for both ! [ plus shipping ]
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MaMa
1 year ago
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Breed Burmese/Manx
Much better value from PetMeds.
Isebelle has been on this medication for years. It has been steadily increasing in price. PetMeds has has made it more affordable. She has responded in many ways. She is gaining weight, less agitated and her skin seems less itchy.
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Joytruck
2 years ago
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Breed Tabby
Very convenient .
I like ordering this pill from PetMeds. Delivered to my door .
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Freckleface
2 years ago
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Breed Mixed Calico
Great company
My cat has a thyroid disease and this company has been great and reasonable prices and made it possible for my cat to receive treatment. I wouldn’t go anywhere else
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Alice
2 years ago
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Necessary for my kitties well being
It comes by mail and on time so I don't have to worry about having it on hand.
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