Nation Cancer worries prompt generic Zantac recalls at Walgreens, Walmart and Rite Aid: What you need to know September 26, 2019Ken Alltucker, USA TODAYComments 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.