Many cats get arthritis, which causes joint pain and makes it hard for them to jump, climb, or play. A newer medicine called Solensia, also known as frunevetmab, is used to help reduce pain from arthritis in cats. I’ve posted about this medication here before. Veterinarians know it can ease pain, but scientists wanted to learn more about possible side effects that might happen when real cats get this treatment.

What Did the Scientists Do?

The researchers (Lai et al, 2026; link below) looked at real reports from veterinarians and pet owners that were sent to the U.S. Food and Drug Administration (FDA). These reports described side effects that happened after cats received frunevetmab. The scientists reviewed thousands of reports to see which problems were most often mentioned.

What Did They Find?

Out of many reports about cats and different medicines, over five thousand were about frunevetmab. These reports included many kinds of side effects. The most common ones were related to the skin, such as itching, hair loss, or rash. Some cats had pain or discomfort where the injection was given.

The researchers also noticed some stronger safety signals for certain skin problems and injection site reactions. In addition, there were some reports of joint swelling or weakness in the legs that were not clearly listed on the official product information.

What Does This Mean for Cat Owners and Vets?

This study does not prove that all of these problems were directly caused by the medicine. However, it helps veterinarians understand what to monitor when giving Solensia. Some side effects may be mild and temporary, while others may require closer follow-up.

The key takeaway is that cats receiving this medication should be monitored carefully. Watching for skin changes, limping, weakness, or behavior changes can help catch concerns early.

Why This Is Important

Solensia can be a helpful option for cats living with arthritis pain. This research does not mean it should not be used. Instead, it highlights the importance of careful monitoring and open communication between veterinarians and cat owners to help keep cats as safe and comfortable as possible.

Read my other posts about this medication here – drbrunke.wordpress.com

Read the whole article here https://academic.oup.com/jvim/article/40/1/aalag003/8472806

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