what are the side effects of Methimazole in cats All questions Answered questions Unanswered questions Choose A Category Behavior Diet & Nutrition Eyes and Teeth Heart & Respiration Immune System Kidney & Urinary Limbs & Bones Miscellaneous Neurological Skin & Coat Tumors & Cancer Vaccinations Search « Back to Previous PageCategory: Miscellaneous Tweet ▲ 0 ▼ ♥ 0 Marked as spam Asked on April 6, 2016 2:33 am 125 views Follow Unfollow ▲ 0 ▼ ✔ Private answer The most common side effect is itchy ears! Other less frequent side effects are vomiting, lack of appetite, and depression. These are typically dose related and decrease with decrease in dose. Marked as spam Posted by Dr. Gaylord Brown Answered on May 2, 2016 5:32 pm « Back to Previous Page