Question: Does root beer have caffeine in it?
Answer: Most root beer does not have caffeine, but there are a few that do. Barq's and Rat Bastard are examples of root beers that have caffeine. See Anthony's Root Beer Barrel for a review of hundreds of different kinds of root beer, including information about whether or not a particular root beer has caffeine. Anthony also has an FAQ that answers Does root beer have caffeine?