The vet is where your human takes you when you are sick. The place smells funny; there are cats, dogs and awful things like needles and pills. Don't let humans cat-handle you. The following are some tips for dealing with vets and medicine.
a) When you see the carrier come out, run and hide. Once the human grabs you, struggle gamely. Splay your legs out so it is difficult to cram you into the carrier. If the human is trying to put you in with another pet, allow the other pet to bolt out the door. In the car, meow plaintively all the way to the vet's. Reach through the bars of the carrier and claw the human as s/he drives. At the vet's, once again splay your legs and brace yourself against the carrier's walls so they can't dump you out easily.
b) At home, resist attempts to feed you pills or liquid medicine. As soon as you hear the pill bottle rattle, hide. Resist attempts to open your mouth. Squirming is good. Shake your head vigorously to remove any medicine placed in your mouth. Refuse any food that smells like it may have had medicine sprinkled in it.