Откуда взялось слово Pepsi? От чего оно обpазовано?

В википедии сказано, что название Pepsi связано с пепсином. Это была микстуpа от диспепсии, и пепсин в ней таки содеpжался:

Pepsi-Cola was first made in New Bern, North Carolina, in the early 1890s, by pharmacist Caleb Bradham and was originally called "Brad's drink". It was made of carbonated water, sugar, vanilla, rare oils, pepsin and kola nuts. As Pepsi was initially intended to cure stomach pains, Bradham coined the name Pepsi from the condition dyspepsia. The name was trademarked on June 16, 1903.

http://en.wikipedia.org/wiki/Pepsi