Felimazole (Methimazole) Tablets for Feline Hyperthyroidism, 5 mg

Felimazole 5 mg for Cats

Thyroid Medication to Manage Hyperthyroidism in Felines

Felimazole (methimazole) 5 mg for cats is an FDA-approved antithyroid medication specifically designed to manage feline hyperthyroidism, a common endocrine disorder in older cats characterized by an overactive thyroid gland. By regulating excess thyroid hormone (thyroxine), Felimazole tablets help control symptoms like weight loss, increased appetite, hyperactivity, and elevated heart rate.

Containing the active ingredient methimazole, Felimazole works by inhibiting the synthesis of thyroid hormones (T3 and T4), restoring hormonal balance and improving your cat’s overall health and behavior. Felimazole is coated for easy administration and comes in a scored, pink, sugar-coated tablet to ensure accurate dosing and better compliance.

All prescription items are Non-Refundable and Non-Returnable.

Please note product may arrive in a HardyPaw Pharmacy vial, manufacturer packaging is shown for reference.

Also Available in: Felimazole 2.5 mg for Cats

What Are the Benefits of Felimazole 5 mg for Cats?

Felimazole offers several advantages over generic methimazole and other thyroid medications:

• Veterinary-exclusive, FDA-approved treatment for feline hyperthyroidism.

• Precisely dosed and scored tablets to ensure accurate dosing.

• Sugar-coated formulation enhances palatability and reduces bitter taste.

• Reduces thyroid hormone (T4) levels within 2-3 weeks of initiation.

• Helps alleviate symptoms such as:

  • Weight loss

  • Increased thirst (polydipsia)

  • Increased urination (polyuria)

  • Vomiting or diarrhea

  • Rapid heartbeat (tachycardia)

• Supports long-term management of thyroid disease without surgery or radiation therapy.

How Do I Know If My Cat Needs Felimazole?

Signs your cat may have hyperthyroidism and benefit from Felimazole:

• Noticeable weight loss despite a good appetite
• Increased water intake and frequent urination
• Restlessness or hyperactivity
• Vomiting or diarrhea
• Rapid breathing or racing heart
• Unkempt coat or hair loss

Your vet will confirm diagnosis with blood tests that measure T4 levels. If elevated, Felimazole may be prescribed.

Dosage and Administration for Felimazole 5 mg

Always consult your veterinary for exact dosage instructions depending on your pet's condition.

Typical dosing guidelines:

• Initial dose: Usually 2.5 mg to 5 mg twice daily.

• Monitoring: Thyroid hormone levels (T4) should be checked every 2-3 weeks to adjust dosage.

• Long-term: Cats may need lifelong therapy, and periodic monitoring is essential to assess liver, kidney, and bone marrow function.

What Ingredients Are in Felimazole for Cats?

Felimazole contains:

Are There Any Side Effects of Felimazole in Cats?

While Felimazole is generally well tolerated, some cats may experience:

• Vomiting or reduced appetite

• Lethargy or depression

• Skin reactions (itching, facial excoriation)

• Blood cell changes (low white blood cell count)

• Liver toxicity (rare)

📌 Note: Any signs of abnormal bleeding, yellowing of the eyes/gums, or sudden behavioral changes should be reported to your vet immediately.

What Warnings or Precautions Should I Know About Felimazole?

• Not for use in pregnant or lactating cats.

• Do not use in cats with pre-existing liver disease, autoimmune disorders, or blood disorders.

• Always wear gloves when handling tablets.

• Keep out of reach of children and other pets.

• Periodic blood tests are essential to monitor thyroid, liver, and kidney health.

Is Felimazole Safe for Long-Term Use in Cats?

Yes, Felimazole is designed for lifelong use in managing hyperthyroidism. When administered under veterinary supervision with routine blood monitoring, most cats tolerate the medication well for extended periods. Periodic thyroid function, liver enzymes, and complete blood count (CBC) tests are recommended to detect any adverse reactions early and adjust dosage as needed.

✅ Pro tip: Long-term treatment success improves with consistent dosing and regular veterinary checkups every 3–6 months.

Shipping & Returns

Shipping Policy: HardyPaw offer all types of shipping options (Ground, Express, Priority, International) depending on the urgency of the product requirements. To know about our shipping policy in detail, click here.

Refund policy: If you face any issue with our product and want to return it, read our refund policy carefully.

FAQs About Felimazole 5 mg for Cats

What is Felimazole used for in cats?

Felimazole is used to treat hyperthyroidism in cats by decreasing the production of excess thyroid hormones, improving symptoms like weight loss, hyperactivity, and excessive thirst or urination.

How long does it take for Felimazole to work in cats?

Felimazole typically begins to reduce thyroid hormone levels within 2 to 3 weeks. Full symptom relief may take longer depending on your cat’s response.

Can Felimazole cure hyperthyroidism in cats?

No, Felimazole controls but does not cure hyperthyroidism. It’s a lifelong therapy unless another permanent treatment like radioactive iodine or surgery is pursued.

Is there a difference between Felimazole and generic methimazole?

Yes, Felimazole is a veterinary-specific, FDA-approved formulation with consistent quality, sugar-coating for better taste, and scored tablets for precise dosing, unlike some generic options.

What should I do if I miss a dose of Felimazole for my cat?

Give the missed dose as soon as you remember. If it's close to the next dose, skip the missed one. Do not double up. Always follow your vet’s guidance for missed doses.

Clinical Research

https://www.petmd.com/pet-medication/methimazole-tapazole-felimazole

https://animaldrugsatfda.fda.gov/adafda/app/search/public/document/downloadFoi/857