Shoppers Drug Mart is offering 20% off regularly priced items on seniors’ day with a Shoppers optimum card  plus a $10 Bonus card on the purchase of $50 or more. This Shoppers Drug Mart offer is valid on Thursday, February 28, 2013. One $10 Bonus Card per transaction per customer. Shoppers Drug Mart Bonus Card is valid until Thursday, March 21, 2013. Not to be used in conjunction with any other Shoppers Drug Mart promotions or offers. While quantities last.