Checkout 51 doesn’t have many cash rebates left it can give out for May 16-22, 2013. All offers are limited. If you have allergies, better pick up your Reactine and scan in your receipt into the Checkout 51 app to claim your $3 cash back. Yeah, you can save $3 on any Reactine product. Cash back from Checkout 51 is valid for purchases made in any store in Canada. Visit Checkout51.com to see more terms and conditions.