Ive taken zantac 150/300 on and off for years. took daily for a few mos at one point per my doc. with announcement today pls explain level of carcinogen dangers. this is scary and unsettling. ?

No worries yet: Just check with your prescribing doctor. In September 2019, the FDA announced that some medications containing ranitidine contain small amounts of a chemical. The FDA is investigating to see if small amounts of that chemical is enough to be a health risk, since that chemical in larger amounts can cause cancer. The FDA says patients should not stop using ranitidine but just talk with their doctors.