Hyperthyroidism

Felanorm® (methimazole) Oral Solution

The Easy-to-Give solution for treating feline hyperthyroidism

  • Cat


Hyperthyroidism is the most commonly diagnosed endocrine disease in cats. It is a serious condition and life-threatening if left untreated.1 The good news is that treatment can be simple and effective. If adequately treated and regularly monitored, most cats with hyperthyroidism can enjoy a normal life. Prompt diagnosis is key, so read on to learn the signs of hyperthyroidism in cats and how your veterinarian can help.

 

The most common symptoms of hyperthyroidism in cats are:
 

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Other less common symptoms of hyperthyroidism in cats can be:

  • Poor haircoat quality
  • Behavioral changes such as
    - Hyperactivity
    - Irritability
    - Aggression
    - Heat intolerance
  • Vomiting and/ or diarrhea
  • Rapid heart rate (tachycardia) or heart murmur
  • Hypertension (high blood pressure)
  • Altered kidney function
  • Enlarged thyroid glands 

There are several treatment options for hyperthyroidism in cats, each of which has its own pros and cons. Your veterinarian will recommend a course of action that suits your cat’s individual needs, but the following can offer you a guide to the options available.

Treatment Options For Hyperthyroidism In Cats
  • [+] Could completely eliminate disease
  • [-] High initial up-front cost
  • [-] Requires specialized facility 

 

  • [+] Could completely eliminate disease
  • [-] Requires anesthesia
  • [-] May require additional surgery
  • [-] May require long-term medical management

 

  • [-] Prescription diet for life
  • [-] Will not eliminate disease
  • [-] Highly restricts cat from eating most treats  and other food 

 

  • [+] Most common approach
  • [+] Manageable cost, spread out over lifetime of cat
  • [-] Requires daily medication, (Easy to give with Felanorm (methimazole) Oral Solution)2
  • [-] Requires clinical monitoring

 

Introducing the Easy-to-Give solution and only FDA-Approved oral solution for Feline Hyperthyroidism

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Easy to Give. Easy to Trust.

  • Honey-flavored formulation designed for feline acceptance

  • Precise dosing for your cat

  • Enhanced owner safety versus transdermal gels

  • Convenient administration for improved compliance

  • Award-Winning Administration: Recognized by the ISFM with the prestigious "Easy to Give"TM Award. (International Society of Feline Medicine)2

 

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Do Cats really like Felanorm Oral Solution?

Product information

Active Ingredient:
Methimazole is a thioureylene antithyroid drug, which inhibits the synthesis of thyroid hormones. Methimazole (1-methylimidazole-2-thiol) is a white crystalline substance that is freely soluble in water. 

Dosage Form and Description:
Felanorm (methimazole) Oral Solution is available at 5 mg/mL in bottles containing 30 or 100 mL with a 1 mL dosing syringe that is calibrated in mg increments.

Indications:
Felanorm Oral Solution is indicated for the treatment of hyperthyroidism in cats.

Dosage and Administration:
Always  follow the instructions and dosing guidance provided by your veterinarian.The product should be administered orally using the enclosed graduated dosing syringe as directed by your veterinarian. The syringe has measurements representing the mg dose of the product. Rinse the oral dosing syringe between uses. (See the Instructions for Preparing a Dose of Felanorm Oral Solution).

Storage:
Store at controlled room temperature 25°C (77°F) with temperature disruptions between 15°-30°C (59°-86°F) permitted. Keep the container tightly closed.

How to administer Felanorm Oral Solution

Reading the Syringe:
Draw liquid to the flat part of the plunger's ring, NOT the pointed tip inside the barrel

Handling: The syringe fits tightly so the bottle can be inverted without leaks

Human Warnings:
As with all methimazole products, wear protective, single-use, impermeable gloves (e.g., latex or nitrile) when administering the solution. Wash hands with soap and water after administration to avoid exposure to drug.

frequently asked questions
  • What is Felanorm (methimazole) Oral Solution?
    • Felanorm Oral Solution is the only FDA approved Oral Solution indicated for the treatment of hyperthyroidism in cats. As an FDA-approved formulation, Felanorm Oral Solution ensures precise consistent quality and strength in every bottle—eliminating the potency risks and batch variability of compounded alternatives. 
    • Our calibrated syringe, marked in 0.25 mg increments, allows for exact dose adjustments tailored to the specific needs of each cat.
    • Because Felanorm Oral Solution is a honey-flavored oral liquid that is easy to give, it eliminates the battle of pilling a cat.
       
  • Why Honey Flavor? Understanding the Feline Preference and Felanorm Oral Solution.
    • Do cats even like honey flavored methimazole?
    • The short answer is yes, but not for the reasons humans do. While humans enjoy honey for its intense sweetness, cats are "sweet blind." They lack the functional taste receptors required to detect sweet flavors. 
    • The appeal of Felanorm's Oral Solution honey-flavored formulation lies in its ability to mask the natural bitterness of methimazole. Our formulation uses honey flavoring to create a smooth experience that makes administration less stressful for both the cat and the owner.
  • When to Contact Your Veterinarian?
    • Felanorm Oral Solution, like all other drugs, may cause side effects in individual cats. These are normally mild, but serious side effects have been reported in cats taking methimazole. It is important to stop the medication and contact your veterinarian immediately if you think your cat may have a medical problem or side effect while on Felanorm Oral Solution.
All FAQs

IMPORTANT SAFETY INFORMATION
Felanorm® (methimazole) Oral Solution: Wear protective single use, impermeable (e.g., latex or nitrile) gloves when administering the solution. Wash hands with soap and water after administration. The most commonly reported side effects in cats are anorexia, vomiting, head/facial pruritus or edema, depression/lethargy, weight loss, anemia, elevated liver enzymes, skin lesions, elevated blood urea nitrogen (BUN), diarrhea, and thrombocytopenia. In some reported cases, the patients recovered after adverse reactions were recognized, the drug was withdrawn, and veterinary care was applied. Methimazole has anti-vitamin K activity and may induce bleeding diathesis without evidence of thrombocytopenia. Not for use in pregnant or lactating queens. Not for use in cats with primary renal or hepatic failure, autoimmune disease, or with hematological disorders (see the full prescribing information for additional details). For full prescribing information, contact VIRBAC at 1-800-338-3659 or view the Client information sheet.

 

Keep your cat’s levels steady and your savings heavy with our Rebates!

Save $10 on a 30mL bottle OR Save $20 on a 100mL bottle. Limited to 12, 30mL rebate claims OR 4, 100mL rebate claims per pet per year.

Rebates applicable only for purchases from your veterinary clinic. Purchases from online pharmacies not affiliated with your veterinary clinic does not qualify (Amazon, Chewy, Allivet, 1800 PetMeds, and Costco/Walmart/Sams Club to name a few do not qualify for this rebate. If you are unsure, please call or email to verify.).

To learn more about how to save visit : https://virbacahrewards.com/ProgramInformation

References: 
1. AAFP Feline Hyperthyroidism Guidelines, 2016.
2. ISFM Easy-to-Give award 2017 (Note: Thyronorm® is the UK version of Felanorm; exact same formulation).