Felanorm Oral Methimazole for Cats

What is Felanorm for Cats?

Felanorm, methimazole, is a recently approved prescription medication used for the treatment of hyperthyroidism in cats. Felanorm is the first generic methimazole oral solution approved by the FDA for use in cats with hyperthyroidism. Learn more. This medication works by blocking thyroid peroxidase, an important enzyme for producing thyroid hormones. By inhibiting this enzyme, Felanorm allows cats who produce unusually large amounts of thyroid hormone to go back down to normal levels and live a better life. 

Felanorm at VetRxDIrect
  • Felanorm is a honey-flavored oral solution containing the active ingredient, methimazole.
  • It is is typically given every 12 hours.
  • It can be given with or without food.
  • Felanorm is available in a 30 mL bottle or a 100 mL bottle.
  • It contains a 1-mL dosing syringe that is marked per milligram for easy dosing.

Warning Signs of Hyperthyroidism in Cats

Hyperthyroidism is caused by the thyroid gland producing too much thyroid hormone. Hyperthyroidism is diagnosed more commonly in older cats and certain breeds of cats. Some common warning signs include:

  • Weight loss
  • Increased appetite
  • Increased thirst
  • Restlessness
  • Rapid heart rate

Side Effects of Felanorm for Cats

Methimazole is usually well tolerated in cats, but side effects can occur. Some common side effects of Felanorm include: changes in appetite (increase or decrease), lack of energy, vomiting, diarrhea or loose stool, skin lesions, itching, and abnormal vocalizations. Cats taking this medication should receive regular checkups with their veterinarian and be monitored for side effects.

Does Felanorm Methimazole for Cats Require a Prescription?

Felanorm can only be obtained with a prescription from a licensed veterinarian. This is because professional veterinary expertise is necessary to diagnose hyperthyroidism in cats and to determine whether methimazole is the right treatment. Continued veterinary check ups are necessary to ensure the dosage remains suitable for controlling the cat’s hyperthyroidism, as this condition can progress over time.


About the Author

This article was written by VetRxDirect pharmacy intern Mitch.

My two cats are Rigby (left) and Gus (right). They are both five years old and are each other’s best friends. Gus likes to steal whole slices of pizza when no one is looking and likes smelling stinky shoes. Rigby likes sneaking into places and is VERY friendly/chatty. -Mitchell, PharmD Candidate 2025, University of Iowa College of Pharmacy

2024 Labor Day Holiday Shipping Schedule

Labor Day Dog

VetRxDirect will be closed to observe Labor Day on Monday, September 2nd, 2024.

Our pharmacy will have abbreviated hours and shipping schedules. While VetRxDirect.com is available 24 hours a day for online order placement, please pay particular attention to our hours and shipping schedule, especially if you rely on our pharmacy for insulin or other temperature-sensitive products.

  • Thursday, August 29: Last day to ship temperature-sensitive orders this week.
  • Friday, August 30: No temperature-sensitive orders will ship.
  • Saturday, August 31: Regular pharmacy hours. No orders will ship.
  • Sunday, September 1: CLOSED.
  • Monday, September 2: CLOSED.
  • Tuesday, September 3: Resume normal hours and shipping policies.

*Prescription orders, including temperature-sensitive drugs, can only ship after approval from your veterinarian. Prescription authorization must be obtained before 3 PM CST in order to be shipped out on the same day. Visit our website for more information.

Please feel free to leave a message or send us an email at info@vetrxdirect.com anytime. We’ll do our best to return your call or send replies during our next business day after your message.

Have a safe and Happy Labor Day!

-The VetRxDirect Pharmacy Team

Apoquel Chewable for Itchy Dogs

POV: Your dog has a terrible itch, and you always find them licking and chewing the itch with no relief. Why are they itching so much? Itchiness, or pruritis, is a very common problem in dogs. It can be caused by a number of factors, and allergies can be one of them. Depending on the type of allergies, certain prescription medications or treatments can be prescribed by a veterinarian to help alleviate symptoms that come with allergies. Some medications usually prescribed for relieving itch include steroids, antihistamines, and medicated topical solutions like shampoos, creams, and sprays. These are the usual medications and treatments that are thought about when we think of itch, but there’s another option that you may not know about. Introducing Apoquel and Apoquel Chewable.

Apoquel Chewable at VetRxDirect
Apoquel at VetRxDirect

What is Apoquel & Apoquel Chewable?

Apoquel, oclacitinib, is a prescription medication for dogs that helps control itching from allergies and other skin conditions. Oclacitinib, the active ingredient in Apoquel, works by blocking cytokines, which are the source of itching and inflammation in the body. In some dogs, it may provide relief in as little as 4 hours with complete relief in 24 hours. It may be used long-term for chronic skin issues or short-term to treat flare-ups in dogs that are at least 1 years old. This medication is generally well tolerated, and side effects are usually minimal but can occur. Apoquel has been on the market for a while, but the manufacturer recently released a chewable formulation. The chewable tablets are pork-liver flavored and some people have found it easier to administer the medication since they are flavored.

At VetRxDirect, we now supply both the tablet and chewable tablets! Before using this medication, it is recommended to speak with your veterinarian about your dog’s condition to see if Apoquel would be a good fit. 

The month of August is known as Itchy Pet Awareness Month, which aims to promote dog and cat skin health and your pet’s health and happiness. While commonly overlooked, itching is a medical condition that requires a proper diagnosis to effectively treat the true cause of the itch. Learn more about Itchy Pet Awareness and Solutions on our other blog!


About the Author


This information is not intended to diagnose or treat any disease and is purely educational. Please seek advice from your pet’s veterinarian with any questions regarding your pet’s health.