Condolences, rlmorel. I have one, Cosmo, who looks just like your cat. My wife gives him medication rubbing on his ears twice a day. We have two others - Lilly and Isabella. Cosmo and Lilly are deaf (getting old). Isabella has 3 legs. It’s tough to loose a pet. We’ve had to put down many throughout the years. Thanks for posting. I’m sure you’ve been a good shepherd.
If they resist taking their medication, try rubbing the throat. It forces them to swallow.