Any self-respecting cat will most likely fight you like crazy when it comes to feeding her medicine. Here’s a tip I recently read about:
Put some of the medicine (liquid only) onto your cat’s coat with an eye-dropper, your cat’s instinct to lick herself clean will also mean she licks up the medicine and voila, no struggle.
For tablet type medicine, we’ve had success crushing the tablet into a powder and delivering it with a syringe.