We ask our patients to refrain from driving if they are on narcotics and while their arms and chest feel uncomfortable. They have to use common sense to make sure in an emergency they can respond. There's not standard answer to your questions. Some patients feel ready after 2 days, and others need 20.
Always best to run these types of questions by your plastic surgeon who knows your situation best and is ultimately responsible for your care. Having said that, most patients are able to resume driving within one week. Of course, you will want to be off medication and be able to respond to an emergency. Best wishes.