This depends on the age, size, temperament and general state of health of your cat. Ask your veterinary. She or he will prescribe the right medication.
I would call your vet and ask, but I would say NO. Do not attempt to give your cat any human drugs. They come in human doses and may potentially be poisonous or deadly. ALWAYS consult your vet! If...
Through your vet. Usually if you put the cat in a cat carrier (you can buy these second-hand at dog grooming places at a considerable lower cost and then sanitize it) there is no need for sedation...