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Matthew King
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Buy Methimazole For Cats



Methimazole is used to treat hyperthyroidism in cats. Methimazole is used to treat overactive thyroid (hyperthyroidism). It is also used before thyroid surgery or radioactive iodine treatment.It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects. Methimazole requires a prescription from your veterinarian, and is sold per tablet.




buy methimazole for cats



Blood tests must be done to check for proper dosage. Do not use in pregnant or nursing animals. Do not give your pet a live vaccine while giving methimazole. Contact your veterinarian immediately if your pet develops signs of an infection.


Tell your veterinarian if your pet has an allergy to methimazole or if your pet has liver disease, a blood cell disorder, or a weak immune system. Tell your veterinarian if the pet is pregnant or nursing. Inform your veterinarian of any other medications, including vitamins and supplements your pet may be taking while receiving methimazole.


Methimazole is a prescription medication not FDA approved for veterinary use; however, it is a commonly accepted practice for veterinarians to use this medication in cats. Methimazole is available as a 5mg scored tablet. The usual initial dose for cats is 5mg every 8 to 12 hours. Do not give methimazole to pregnant or nursing animals. Methimazole can increase the risk of bleeding. Methimazole can lower the blood cells that help fight infections. Your veterinarian will need to give blood tests on a regular basis to be sure these blood cells do not get too low. Do not give the pet a "live" vaccine while the pet is taking methimazole. Methimazole is needed for the life of the pet. If the medication is stopped, the symptoms will reappear.


Give this medication exactly as directed by your veterinarian. Do not give in larger amounts, or give it for longer than recommended by your veterinarian. Follow the directions on the prescription label. If you do not understand the directions ask the pharmacist or veterinarian to explain them to you. Methimazole can be given with or without food. Allow plenty of water for the pet to drink. Store methimazole at room temperature away from moisture and heat. Keep this medication away from children and pets.


If any of the following serious side effects occur, stop giving methimazole and seek emergency veterinary medical attention; an allergic reaction (difficulty breathing; swelling of the lips; tongue or face; hives). Stop giving methimazole and contact your veterinarian at once if your pet develops any of these serious side effects; fever, chills, body aches; easy bruising or bleeding, unusual weakness; blood in the urine or stools; severe blistering, peeling, and skin rash; nausea, low fever, loss of appetite, dark urine, jaundice. Other less serious side effects may occur. Continue giving methimazole and talk to your veterinarian if your pet experiences headache, drowsiness, dizziness; mild nausea, or vomiting; itching; muscle, joint, or nerve pain; swelling; hair loss. Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to the animal.


The most common sign of hyperthyroidism in cats is weight loss despite an increased appetite. Other common signs include vomiting, diarrhea, hyperactivity, drinking and urinating more than normal, and an unkempt hair coat. Because the disease develops gradually, signs are often easy to miss at first.


One way to treat a cat with hyperthyroidism is with an oral medication that contains methimazole. The medication can be given life-long or to stabilize the cat before other treatment options, such as radioactive iodine therapy or surgery.


Veterinarians should carefully monitor cats with kidney disease that are receiving Felimazole. Older cats often have both hyperthyroidism and kidney disease, and treating these cats is a delicate balancing act. In cats with hyperthyroidism, the high level of thyroid hormones increases the blood flow to the kidneys, which helps their kidneys and may even hide kidney disease. Once the excessive level of thyroid hormones is lowered by Felimazole (or any treatment for hyperthyroidism), the blood flow to the kidneys returns to normal and the kidney function in some cats will worsen. Regularly checking blood tests and urine samples will help monitor for signs of kidney disease.


Veterinarians should monitor cats on Felimazole for any sign of illness, including fever, enlarged lymph nodes, and anemia. If these signs occur, your veterinarian may recommend stopping the Felimazole and doing appropriate blood tests.


Methimazole, the active ingredient in Felimazole, can cause birth defects in people. The drug crosses the placenta and concentrates in the thyroid gland of the fetus. The drug is also found in breast milk. Pregnant women, women who may become pregnant, and nursing mothers should wear gloves when handling Felimazole tablets, cat litter, or the bodily fluids of treated cats.


The objectives of this study were to assess serum thyroxine concentrations and clinical response in hyperthyroid cats to treatment with transdermal methimazole, and to determine if further investigation is indicated. Clinical and laboratory data from 13 cats with hyperthyroidism were retrospectively evaluated. Methimazole (Tapazole, Eli Lilly) was formulated in a pleuronic lecithin organogel (PLO)-based vehicle and was applied to the inner pinna of the ear at a dosage ranging from 2.5mg/cat q 24h to 10.0mg/cat q 12h. During the treatment period, cats were re-evaluated at a mean of 4.3 weeks (recheck-1), and again at a mean of 5.4 months (recheck-2). Clinical improvement was observed, and significant decreases in thyroxine concentrations were measured at recheck-1 (mean: 39.57nmol/L, SEM: 14.4, SD: 41.2) and recheck-2 (mean: 36.71nmol/L, SEM: 13.9, SD: 45.56) compared to pretreatment concentrations (mean: 97.5nmol/L, SEM: 11.42, SD: 39.5). No adverse effects were reported.


Methimazole is commonly used for the pharmacologic management of feline hyperthyroidism.1 This article reviews the properties of methimazole that are of importance to practitioners treating this common endocrinopathy.


This compound belongs to the imidazole-thiones. These aromatic compounds contain an imidazole ring, which bears a thioketone group. Methimazole (1-methylimidazole-2-thiol; Figure) is a white, crystalline substance that is freely soluble in water. The chemical formula is C4H6N2S; molecular weight is 114.16 daltons. Carbimazole, which is also used in the treatment of hyperthyroidism in cats, is a prodrug, which is converted to methimazole in the liver.


Treatment. Two drugs have been licensed for cats in the last decade: methimazole and its prodrug carbimazole. Based on current evidence and available tablet sizes, recommended starting doses include:


Results. Management of hyperthyroidism using United Kingdom veterinary-licensed oral antithyroid medication (methimazole or carbimazole) was associated with 72% to 75% success rates in terms of owner-assessed clinical outcome. 041b061a72


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