Nation Cancer worries prompt generic Zantac recalls at Walgreens, Walmart and Rite Aid: What you need to know September 26, 2019 Ken Alltucker, USA TODAY Comments Off on Cancer worries prompt generic Zantac recalls at Walgreens, Walmart and Rite Aid: What you need to know Two drugmakers initiated recalls of generic versions of Zantac after testing found a probable carcinogen.