Methimazole COMPOUND


Methimazole is used to treat hyperthyroidism in cats.

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Methimazole Compound Basics
Methimazole is an anti-thyroid agent. The thyroid gland takes in iodine that is digested and turned into the thyroid hormones T4 and T3. The thyroid hormone is responsible for regulating the body’s metabolism. When the thyroid gland produces too much T3 and T4, weight loss, abnormal appetite, and heart problems occur. High levels of T3 and T4 are fairly common in older cats. Methimazole is used to treat hyperthyroidism, or an overactive thyroid gland. Methimazole works by blocking iodine’s entry to the thyroid gland. Without iodine, the thyroid gland cannot produce T4 and T3.

Methimazole Compound Facts
Methimazole is available by prescription only. Methimazole is available as an extra-label drug. Methimazole is for use in cats only. Methimazole effectively treats hyperthyroidism in cats, controlling symptoms for improved quality of life. Methimazole does not cure hyperthyroidism. Methimazole creams and suspensions make it easier to administer medication, especially to cats who have difficulty taking pills.

Methimazole Compound Warnings
Keep out of the reach of children and pets. Do not use in cats with known allergies to methimazole. Do not use in pregnant or lactating cats. Do not administer live vaccines while administering methimazole. Blood tests must be done to check for correct dosage. Use caution in cats suffering from liver disease, immune system disease, or blood disorders. Use caution when administering methimazole or when disposing of waste from cats taking methimazole. Owners, especially pregnant women, should wear gloves when handling tablets or waste from cats taking methimazole.

Methimazole Compound Directions
Use as directed by your veterinarian. Follow the instructions printed on the prescription label. Store methimazole at room temperature. Be sure to complete the prescription to ensure a full recovery, even if your cat seems to be improving, unless instructed otherwise by your veterinarian. Duration of administration depends on the condition being treated, response to the medication, and development of any adverse effects. Allow your pet access to plenty of water while giving methimazole. Periodic blood tests are needed to monitor T4 and T3 levels. Wash your hands after administering methimazole. Owners, especially women who are pregnant or nursing, should use caution while administering methimazole and while handling waste from cats taking methimazole.

Methimazole Compound Dosage FAQs
In the case of a missed dose of methimazole, give it as soon as you remember or wait until it is time to give the next dose. DO NOT GIVE A DOUBLE DOSE OF METHIMAZOLE. In the case of an overdose of methimazole, seek attention from your veterinarian immediately. The following symptoms could be signs of an overdose fever, joint pain, diarrhea, lethargy, itching, swelling, or bruising.

If you notice any behavioral or physiological changes in your pet while giving methimazole, contact your veterinarian immediately.

Allergic Reactions and Serious Side Effects
Allergic reactions and serious side effects are rare, but in the case of an allergic reaction or a serious side effect you should stop methimazole treatment and seek veterinary attention. Some common allergic reactions and serious side effects are facial swelling, breathing difficulties, hives, dark urine, jaundice, blood in urine or stool, easy bruising or bleeding, chills, blistering or peeling, skin rash, or unusual weakness.

Additional information


Chewables, Oral Suspension, Tiny Tablet, Transdermal Ear Cream

Prescription Strength

1.25mg, 2.5 mg / 0.1 mL 1mL Syringe, 2.5 mg / 1 mL 60mL Bottle, 2.5mg, 2.5 mg / 1 mL 90mL Bottle, 3mg/0.1mL, 1mL Syringe, 3.75mg, 5 mg / 1 mL 90mL Bottle, 5 mg / 1 mL 60mL Bottle, 5 mg / 0.1 mL 1mL Syringe, 5mg, 5 mg/ 1 mL 30mL Bottle, 5mg/ 1mL, 180mL, 6mg/ 0.1 mL Syringe, 6mg/1mL, 30mL Bottle, 6.25 mg / 0.1 mL 1mL Syringe, 7mg / 0.1mL 1mL Syringe, 7.5 mg / 0.1 mL 1mL Syringe, 10mg/1mL, 30mL Bottle, 10mg/1mL 120mL Bottle, 10mg/0.1mL, 1mL Syringe, 10mg/1mL 90mL Bottle, 10 mg/ 1mL 60mL Bottle, 25 mg / 0.1 mL 1mL Syringe