I really love Dr. Pepper!  Do you like it?
I love Dr Pepper, a carbonated soft drink, which has been marketed as having a unique flavor. I haven't had one years though!
Does it have caffeine in it?
I'm pretty sure it has caffeine and there are variants that do not have high fructose corn syrup which was first introduced in the 2000s.
I prefer to not have high fructose corn syrup.  was Dr. Pepper created by an American?
Dr Pepper was created by a pharmacist named Charles Alderton from Texas in the 1880s.
Wow!  I didn't know a pharmacist created it.  Did he think it had medicinal properties?
I don't know if he thought it had medicinal properties but he formulated the drink in Morrison's Old Corner Drug Store in Waco, Texas.