How to Treat Diarrhea From Methimazole in Cats

As the standards of pet care have risen, so have our pet's life expectancies. As a consequence, older cats are being treated for chronic illnesses more frequently. Hyperthyroidism is a common endocrine disorder among older cats. The medication for treating feline hyperthyroidism is Methimazole. Methimazole is available in pill, flavored liquid, or topical gel form, the latter being somewhat easier to apply to cats that may reject solid forms of medication. The medication works well, is readily available and affordable and is known to have minimal side effects. Unfortunately, one of the few side effects that it does seem to cause is diarrhea. According to Pet Place.com, approximately 15 percent of all cats who take Methimazole will experience diarrhea. If your cat is one of the unfortunate few, he will require extra attention for a few days.

Things You'll Need

  • Baby food chicken
  • Rice
  • Dry, low fat cat food

Instructions

    • 1

      Stop giving the cat Methimazole, at least until the diarrhea is under control.

    • 2

      Withhold the cat's food 24 hours. Let him have full access to water, which is necessary to prevent dehydration. The cat is likely to react badly to this particular step, thinking you've forgotten her dinner. Take a deep breath and remind yourself it is only for one day to benefit her health.

    • 3

      Mix a jar of baby food chicken with an equal measure of rice and offer this in small quantities to the cat at the end of the 24-hour fasting period.

    • 4

      Add dry cat food to the mixture after one week.

    • 5

      Increase the amount of dry cat food gradually while decreasing the amount of chicken and rice. The cat will then be on dry food at around the same time you try to medication again.

    • 6

      Reduce the amount of Methimazole your cat is being given. This is easier if you're using the topical application than it is if you're medication is in pill form. Give half the recommended dosage for two weeks, and then return to the advised dose. If the diarrhea continues return to the veterinarian's office