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Methimazole Transdermal Gel (Compounded) Rx

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Methimazole Transdermal Gel

To provide the freshest product possible, VetRxDirect makes most compounded medications to order after we receive prescription authorization from your veterinarian.  Occasionally, this may add an additional day or two to our shipping terms.  We appreciate your understanding of this policy.

Beyond Use Date:

It is recommended the Transdermal gel and the suspension be used within 3 months.  Do not keep medication beyond the use date.  Quantities and charges ordered exceeding the beyond use date will be adjusted.

Prescription Methimzaole transdermal gel provides fast, effective, long-term treatment of hyperthyroidism in cats. The gel, mixed for your cat’s specific dosage needs, reduces the amount of thyroid hormone produced in the thyroid gland.


  • Treats hyperthyroidism in cats
  • Customized dosing for your cat
  • Topical gel is easy to apply
  • Protective finger cots or examination gloves should be worn when applying this medication.


Hyperthyroidism can be a life-long condition that causes a range of uncomfortable symptoms in cats. If your cat is suffering from hyperthyroidism, your veterinarian may prescribe Methimazole. This medication slows hormone production in the thyroid gland and can be used for long-term control of the condition. Exact dosing is critical to successful treatment so we blend the right amount of Methimazole into an easy-to-apply gel just for your cat. Just rub it right into your cat’s skin as directed by your veterinarian.


What you should know about Methimazole:

  • Talk to your veterinarian before using this product.
  • Follow dosing directions exactly - don’t give your pet more medication than directed and don’t skip doses.
  • Read the label carefully for information about storage, possible side effects, and drug interactions.


For additional information about Methimazole, click the “More Information” and “Package Insert” tabs above. 



Methimazole Compounded Transdermal Gel

Methimazole is highly effective for treating cats with hyperthyroidism.  This medication controls the condition by slowing the production of thyroid hormones. When mixed to your cat’s specific needs, Methimazole can quickly and effectively control your pet’s medical condition and keep her more comfortable and healthy over the long term. Please note that VetRxDirect only compounds (or mixes) Methimazole based on a veterinarian’s prescription.


Methimazole Compounded Transdermal Gel

The dosage and formulation of Methimazole can be customized to make your cat’s ongoing hyperthyroidism treatment more effective and easy to manage. The transdermal gel formula contains the exact amount of the medication your cat needs in an easy-to-apply gel that is quickly absorbed into the bloodstream.

  • Protect your finger when applying the gel with either a glove or finger cot or apply the gel with a cotton swab
  • Rub the prescribed amount of gel into the inside of your cat’s ear where there is the least fur
  • If residue remains after the gel dries, it can be wiped off with a damp cloth or cotton swab


Methimazole Dosage

The normal dosage of Methimazole Compounded Transdermal Gel is 1.25mg-10mg given once or twice a day. Refer to your prescription for the exact dose your cat needs.


Compounded Methimazole Storage

Store this medication at room temperature away from direct light. Keep it out of reach of children.


Expiration Date

Because this medication is mixed to order for your cat, it should be used within 3 months. Do not keep the medication beyond the use date.


Side Effects

Side effects of Methimazole are generally rare. Reported side effects include: anorexia, vomiting, lethargy, self-excoriation (clawing and biting), and excessive scratching of the face.


Methimazole Cautions and Warnings

If you notice side effects of this medication, consult your veterinarian or pharmacist. 

You can find a Client Information Sheet which provides a summary of information about Methimazole for Cats by following the link below:


Methimazole Client Information Sheet*


If you have questions or concerns about Compounded Methimazole Transdermal Gel, or conditions related to its use, contact your pet's veterinarian or pharmacist.


*This link opens in a new window.