http://www.cvs.com/help/contact-us-faqs.jsp?type=store&topicid= Q. Does CVS/pharmacy allow more than 1 coupon to be used per transaction? Answer A. Yes. CVS/pharmacy allows ONE CVS/pharmacy and ONE third party manufacturer coupon per item. A transaction is defined as the entirety of purchases on a single receipt. ExtraBucks® Rewards coupons can be applied toward the final cost. Normal exclusions apply. See the bottom of the ExtraBucks® Rewards coupon for details. Note: Coupons cannot be applied to a "free" item. ------------------ A transaction is defined as the entirety of purchases (purchase是多数,所以 1coupon per purchase 是可以多数)