The coupons displayed on third-party websites are out of our control. Unfortunately many sites do not include the terms and conditions for using a particular coupon. Therefore it is up to our patient service representatives to determine if a coupon code is valid for a particular order. If there is a discrepancy between a coupon offered by a third-party website and us, our policies will prevail. If you have further questions about coupon usage please do not hesitate to contact us