Is it Pepsi or is it Pepsi Cola?

yes

check the ingredients label!!!! when it was first created though(when it was called brad's drink) it was made from pepsin, cola nuts, vanilla extracts, and syrups. now you have an answer. you could...

Yes, Pepsi Cola is a cola. So, is Diet Pepsi Cola.

Pepsi Cola is a Brand name like Mountain Dew and others like Dr.Pepper.

mtn dew, sierra mist, mug root beer, crush,tropicana, lipton just to name a few