Slow-Mag a popular dietary supplement sold at CVS, Walgreens, and other popular drug, food, and discount stores. Signup HERE for $2.00 rebate on Slow-Mag to receive your $2.00 rebate by mail: Cut out original UPC code from a package of Slow-Mag? Tablets. Include original cash register receipt dated between December 1, 2008 and December 31, 2010 with the purchase price paid and date circled. Retailer name must be printed on the receipt for verification.