These resources are brought to you by the Cooperative Extension System and your Local Institution

Horses Home

FAQ #24686

Have a question? Try asking one of our Experts

Is there any documentation showing effects of ivermectin dewormers on summer hair coats? I have noticed a difference in horses' hair coats when they are used. The coats were roughed up, as if body clipped, and, in fact, I was told by two vets that ivermectin products shouldn't be used when hair coat appearance is important, such as showing/halter, etc. I was told that they should only be used in late fall/winter.

Last Updated: May 23, 2008


View as web page

To the best of knowledge of clinical veterinarians consulted who have done research in this area, there is no evidence to verify that what you describe is a true cause-and-effect occurrence. Ivermectin, if it crosses the blood-brain barrier, has not been reported to have any direct effect on mammalian systems other than neurological signs. If hair coat issues are a real result of ivermectin use, it hasn't been proven. We base recommendations on published research, and so far there is none related to ivermectin and hair coats.

Browse related FAQs by tag: horses, health, ivermectin

Have a specific question? Try asking one of our Experts

Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.


View this page: