Is There More Caffeine in Pepsi or Mountain Dew?
                                
                                
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                                    4 min read                                
                            
                                A standard 12-ounce can of regular Mountain Dew contains approximately 54 milligrams of caffeine, while a standard 12-ounce can of regular Pepsi contains about 38 milligrams. This means that Mountain Dew has a significantly higher caffeine content than its cola counterpart.