"Breakthough" drugs and growth in expenditure on prescription drugs in Canada.

Discusses the rapid growth in expenditures on prescription drugs in Canada. Factors contributing to shifts from old to new products; Criteria for "breakthrough," "me-too," and "vintage generic" drugs; Methods used in the study which took data from the annual reports by the Canadian Patented Medicine Prices Review Board to explain the 80% increase in drug expenditure in British Columbia between 1996 and 2003; Finding that increased spending is on new drugs introduced in established chemical subclasses.