Felanorm (methimazole) Oral Solution For Cats

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Description

​Felanorm™ (Methimazole) Oral Solution is a trusted prescription medication designed to manage hyperthyroidism in cats by reducing excessive thyroid hormone production. This easy-to-administer liquid formulation ensures precise dosing, making it an excellent alternative to traditional tablets for cats that struggle with pills. By effectively stabilizing thyroid function, Felanorm helps alleviate common symptoms of hyperthyroidism, such as weight loss, excessive appetite, increased thirst, restlessness, and rapid heart rate. Veterinarian-recommended and FDA-approved, this oral solution supports long-term feline health and improves overall well-being.

Active Ingredients

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. The chemical formula is C4H6N2S. Molecular weight is 114.16.

Important Safety Information

CAUTION: As with all drugs, side effects may occur. The most commonly reported side effects are anorexia, vomiting, head/facial pruritus or edema, depression/lethargy, weight loss, anemia, elevated liver enzymes, skin lesions, elevated BUN, diarrhea, and thrombocytopenia. Felanorm® Oral Solution is not for use in pregnant or lactating queens, or cats with renal, hepactic, or hematological disorders. In some reported cases, the patients recovered after adverse signs were recognized, the drug was withdrawn, and veterinary care was applied. In some cases, death (or euthanasia) has been reported as an outcome of the adverse reactions listed above. Methimazole has anti-vitamin K activity and may induce bleeding diathesis without evidence of thrombocytopenia. Refer to the prescribing information for complete details.

Dosage and Administration

​Always include the Instructions for Preparing a Dose of Felanorm (methimazole) Oral Solution and the Information for Cat Owners with a prescription. The starting dose of Felanorm is 2.5 mg administered every 12 hours. Following 3 weeks of treatment, the dose should be titrated to effect based on individual serum total T4 (TT4) levels and clinical response. Dose adjustments should be made in 2.5 mg increments. The maximum total dosage is 20 mg per day divided, not to exceed 10 mg as a single administration. Hematology, biochemistry, and TT4 should be evaluated prior to initiating treatment and monitored after 3 weeks and 6 weeks of treatment. Thereafter, bloodwork should be monitored every 3 months and the dose adjusted as necessary. Cats receiving doses greater than 10 mg per day should be monitored more frequently. The product should be administered orally using the enclosed graduated dosing syringe. The syringe has measurements representing the mg dose of the product. Rinse/clean the oral dosing syringe between uses. (See the Instructions for Preparing a Dose of Felanorm (methimazole) Oral Solution).