I believe you have drank Dr. Pepper before, it is a carbonated soft drink marketed as having a unique flavor.
Yes I used to drink it a lot as a kid but realized soft drinks are not healthy.
I believe this one is a little different, It was invented in 1880s by pharmacist Charles Alderton in Waco, Texas
I see, yes it might be different. I was thinking of Pepsi and Coke actually. 
Dr Pepper was first nationally marketed in the United States in 1904
That is over a 100 years ago now. Its still around so people must like it a lot.
Yes, The U.S. Patent Office approved it in december 1885 
I see, they must realized what a good product it was too approve it so quickly.