All meds have side effects and there are usually factors that make them more or less likely (or dangerous) which is why we need someone that knows and understands all the factors involved (including our dogs health and individual factors) to prescribe them and monitor our pups and check them out if something seems wrong while they are on meds so things can be safely changed or adjusted. There have been a few cases of hearing loss or partial hearing loss with the drug but primarily with other factors involved such as it has happened with mostly geriatric dogs and is usually temporary. You can find out more about it by clicking the link.
www.drugs.com
www.drugs.com