Does Diet Dr Pepper have caffeine? Yes, Diet Dr Pepper does have caffeine. Diet Dr Pepper, like regular Dr Pepper, contains caffeine. However, the amount of caffeine in Diet Dr Pepper is lower compared to the regular version. To get the exact amount of caffeine present, you can visit the Dr Pepper Nutrition page on the official Dr Pepper website. How much caffeine does Diet Dr Pepper contain? The amount of caffeine in Diet Dr Pepper varies. The exact amount of caffeine in Diet Dr Pepper can vary slightly depending on the production batch and other factors. It is recommended…