Methimazole (Veterinary) Per prescriber order — Compounded Transdermal Gel / Oral Liquid Patient Monograph

Patient education monograph for Methimazole (Veterinary) (Per prescriber order), a compounded transdermal gel / oral liquid. Learn how it works, how to use it, possible side effects, and find a licensed compounding pharmacy near you.

What is Methimazole (Veterinary)?

This compounded veterinary preparation contains methimazole formulated pursuant to a veterinary prescription for feline hyperthyroidism management.

How does Methimazole (Veterinary) work?

Methimazole inhibits thyroid peroxidase, an enzyme required for thyroid hormone synthesis in the thyroid gland. This reduces production of T4 and T3, controlling feline hyperthyroidism — one of the most common endocrine disorders in older cats.

How to use Methimazole (Veterinary)

Apply the prescribed amount to the inner ear flap (pinna) using a gloved finger and rotate ears with each application. Or administer oral liquid as directed by the veterinarian.

Methimazole (Veterinary) side effects

Vomiting, itching of the head and neck, and lethargy are most commonly reported in cats. More serious but rare effects include facial excoriations, low white blood cell counts, low platelet counts, and liver toxicity. Wear gloves to avoid human skin absorption.

Drug interactions with Methimazole (Veterinary)

Discuss with your veterinarian if your cat takes other medications. Methimazole may reveal previously masked kidney disease as hyperthyroid-related high blood flow normalizes after treatment starts. Kidney monitoring is therefore essential.

How to store Methimazole (Veterinary)

Store at room temperature away from heat and light. Keep tightly closed.

Precautions for Methimazole (Veterinary)

For veterinary use only pursuant to a veterinary prescription. Use gloves when applying transdermal gel. Keep out of reach of children and other pets.

Frequently Asked Questions — Methimazole (Veterinary)

What is Methimazole (Veterinary)?
This compounded veterinary preparation contains methimazole formulated pursuant to a veterinary prescription for feline hyperthyroidism management.
How does Methimazole (Veterinary) work?
Methimazole inhibits thyroid peroxidase, an enzyme required for thyroid hormone synthesis in the thyroid gland. This reduces production of T4 and T3, controlling feline hyperthyroidism — one of the most common endocrine disorders in older cats.
How do I use Methimazole (Veterinary)?
Apply the prescribed amount to the inner ear flap (pinna) using a gloved finger and rotate ears with each application. Or administer oral liquid as directed by the veterinarian.
What are the side effects of Methimazole (Veterinary)?
Vomiting, itching of the head and neck, and lethargy are most commonly reported in cats. More serious but rare effects include facial excoriations, low white blood cell counts, low platelet counts, and liver toxicity. Wear gloves to avoid human skin absorption.
Are there drug interactions with Methimazole (Veterinary)?
Discuss with your veterinarian if your cat takes other medications. Methimazole may reveal previously masked kidney disease as hyperthyroid-related high blood flow normalizes after treatment starts. Kidney monitoring is therefore essential.
How should I store Methimazole (Veterinary)?
Store at room temperature away from heat and light. Keep tightly closed.
What precautions should I know about Methimazole (Veterinary)?
For veterinary use only pursuant to a veterinary prescription. Use gloves when applying transdermal gel. Keep out of reach of children and other pets.
Where can I get compounded Methimazole (Veterinary)?
Methimazole (Veterinary) is available through licensed compounding pharmacies on the SlimionRX network. Visit slimionrx.com to find a pharmacy near you.
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