Cecil says that “Dr Pepper contains 39.6 milligrams of caffeine in every 12 oz. can.”, but how much do other sodas (pepsi, coke, cherry coke, cherry pepsi, mt. dew, sunkist, surge, mello yello, etc.) contain (per 12 oz. can)?
This page, http://www.cspinet.org/new/cafchart.htm,
has a table of caffeine content of many popular American foods, beverages and OTC medicines.