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Methimazole Tablets- 5mg, 100ct
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Methimazole Tablets

Item #: 80157-174-420
Availability: In Stock
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Starting at: $18.99




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  • Used for the treatment of hyperthyroidism in cats by lowering the amount of thyroid hormones
  • Does not cure the disease but helps control it when given for the rest of the cats life
  • May also be used to protect the kidneys in dogs receiving cisplatin chemotherapy

This product is available by prescription only.
How to Order Prescription Medications
Prescription Authorization Form (PDF)
Please Note:
*Due to federal and state law, we cannot accept returns on prescription items.
*Revival Animal Health is licensed to sell prescriptions in 39 states. Click here to see the state list.
Methimazole Tablets is used for the treatment of hyperthyroidism in cats by lowering the amount of the thyroid hormone. It does not cure the disease, but helps control hyperthyroidism if given for the rest of the cat's life. May also be used to protect the kidneys in dogs receiving cisplatin chemotherapy.
Active ingredient: Methimazole.
Side Effects
Safety depends on correct dosage and administration, exactly as your veterinarian prescribed. Tell your veterinarian about other health conditions your pet has or medications they may be taking.

Side Effects:
Most side effects occur within the first year of therapy. Side effects may include vomiting, loss of appetite, skin conditions & sores and anemia.
May cause serious effects on liver, blood and immune systems. Use extreme caution in animals with anemia, liver diseases or any immune problems. Not for use in animals that are hypersensitive to methimazole.

May be used in pregnant animals, but use extreme caution as it may cause thyroid problems in the babies. After receiving colostrum, kittens should be placed on a milk replacer to lessen absorption of methimazole.

Disposal of unused prescription medications:

  1. Revival Animal Health participates in the Take Away Environmental Return System which provides an environmentally safe destruction program.
  2. The preferred method of drug disposal is to return the unwanted product to a pharmacy that participates in the Take Away Environmental Return System. Seek a local pharmacy that participates in this program for safe disposal.
  3. A secondary method of drug disposal is to remove the unwanted medication from any wrappers or containers and place it in a plastic bag with moist coffee grounds or cat litter. This can be disposed of in the regular garbage collection.
  4. Please do NOT dispose of unwanted meds down the drain or toilet, as this may eventually find its way into the human water supply.

Disposal of medical sharps:

  1. When you're finished with the syringe and needle, do not try to recap, remove, bend or break the needle. This is where most injuries occur.
  2. Dispose the syringe and needle immediately in a nearby sharps container. All sharps must be deposited in a puncture-proof container. Make sure your storage location is child and animal proof.
  3. As with all product handling, make sure you wash your hands after handling medical sharps.

Disposal of sharps container:

  1. When your sharps container is half-full, sift dry Portland Cement throughout the sharps. Fill the container with water, and rotate until the cement is mixed and the sharps have been distributed throughout the cement mixture. Let cement dry for 24 hours.
  2. Seal the lid of the container tightly and use duct tape to seal. Label the container “Livestock Sharps” to properly identify the contents.
  3. Dispose of the containers in accordance with your state’s regulations.

Our pharmacy hours are Monday-Friday 8:00 a.m. − 4:30 p.m. CST.

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