U.S. patent filed Sept. 23, 1902, by Caleb D. Bradham (1867-1934), pharmacist and drugstore owner of New Bern, N.C., probably from pepsin; early Pepsi ads tout it as a digestive aid.
Examples from the Web for pepsi-cola
Historical Examples of pepsi-cola
She turned back and saw the half-empty Pepsi-Cola bottle on the floor beside the bed table.Deadly City
Paul W. Fairman