I am actually on 30 mg. time release morphine (MS Contin) three times a day with Percocet for breakthrough pain. My driving is not impaired by the medication, but increasingly by my weakness. I am a stay at home mom, but play strategy games, cook, and have taught high school English on the meds. It does take some adjustment and I worked up to this dosage over three years. A few Percocet to tide you over traveling should not impair you, but it is always wise to see how you react before operating a car.