During its fourth-quarter conference call on Wednesday, CVS Caremark officially unveiled its foray into the international drug store space with the acquisition of Brazilian retailer Onofre, the eighth-largest drug chain in Brazil.

Now that the other shoe has dropped, what's next?

While chains are prevalent, Brazil remains a highly fragmented market that is clearly ripe with opportunities thanks, in part, to an aging population, a decline in unemployment and a rise in incomes.