Abstract
Three-tier pharmacy benefit plans are the dominant structure in prescription drug coverage today. In these plans three copayments exist. The lowest copayment is for generics, the middle copayment is for preferred brands and the highest copayment is for non-preferred brands. The premise of these plans is that by shifting the burden of cost onto the consumer, consumers will be more judicious in their prescription purchasing behavior. This review article outlines the empirical evidence regarding the utility of three-tier plans in changing consumer’s prescription purchasing behavior.
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