I got bite while trying to feed my cat the pill comfortis. so my cat wouldn't just eat his flea pill (Comfortis), so the vet. told me to open his mouth put it in the back of his throat, hold his head up and he would swallow it. I got bit in the process basically didn't work, but my finger has doubled in size! I was trying to find out if I comfortis got in my finger when he (the cat) bit me if it would cause me any harm?