http://www.dulcolaxoffers.com/
http://www.dulcolaxoffers.com/pdf/dulcolax_form.pdf

Purchase one (1) Dulcolax® or DulcoEase® 25 ct+, Dulcolax® Suppository 4 ct+, or DulcoGas™ 18ct+, between 01/04/2015, and 01/12/2015 at retail and get a rebate check by mail of up to $10.00 on the purchase price (excluding tax).
Request for rebate must be postmarked and received by 2/15/2015. Freebate offer validity varies by retailer — details in rebate form.