From the Detroit News:
Why drugs cost more in the U.S.
Buying prescriptions drugs from a Canadian mail-order company rather than her neighborhood pharmacy in Farmington Hills will save 74-year-old Erica Shire at least $2,000 this year.

Shire, who takes seven medications daily to control diabetes and a heart problem, would rather buy her medicine in America but simply can't afford it.

"I don't know why the richest country in the world cannot have medication for seniors cheaper," she said.

From the Canadian Press:
Two potential new Viagra rivals heading for lucrative U.S. market
Viagra, the little blue pill that has revolutionized the sex lives of millions of men, has two potential rivals knocking at the door of the big U.S. market.