My 14 year old cat Jack was recently diagnosed as hyperthyroid. He was prescribed transdermal methimazole that we have to rub into the skin inside his ear flap twice a day. I have to apply it with gloves as it can go through my skin barrier as well. I have a couple questions that I didn’t ask my vet at the time. Is this a medication cats normally have to take for the rest of their lives and what precautions do I have to take when I’m petting him after the application. How long before it is all absorbed? I’ve been avoiding petting his head at all but he really loves his pets.