The price rating is based on the medium wholesale price for Cartia XT (Diltiazem) . The medium wholesale price is the recommended selling price. Insurance companies often use this price as the basis for Cartia XT (Diltiazem) reimbursement. This cost does not indicate what you would pay for Cartia XT (Diltiazem) if covered by your prescription benefit plan. Dollar signs are used to reflect the following price ranges: $ = < $25, $$ = $25 to $49, $$$ = $50 to $99, $$$$ = $100 to $199, and $$$$$ = > $200.