Is Zantac safe during pregnancy?

What does the evidence say about Zantac during pregnancy?

1. Ranitidine was withdrawn in the United States and suspended in Europe and Australia after testing found unacceptable levels of NDMA, a probable carcinogen; famotidine, cimetidine and nizatidine remain available. 1
2. Famotidine, the active ingredient in the product now sold under the Zantac name, has its own pregnancy fact sheet, and studies of its use have not reported a higher chance of birth defects. 2
3. Before the recall, a large cohort study of first-trimester exposure to ranitidine or cimetidine found no increase in non-genetic congenital malformations. 3
4. Gastroenterology reviews of pregnancy care describe both cimetidine and ranitidine as having been used with excellent safety profiles, which is why the class remains a standard step when antacids stop covering symptoms. 4
5. The lactation database notes that ranitidine itself was not a nursing concern, but that it can break down into a toxic compound if not formulated and stored properly, which is the same chemistry that drove the recall. 5

Is Zantac safe in each trimester?

• First trimester. If you took original ranitidine in an earlier pregnancy or before the recall, the pregnancy studies that exist are reassuring: first-trimester cohort data did not show a rise in birth defects. The recall was about a contaminant found in the pills, not about a fetal risk that had been discovered.
• Second trimester. This is usually when reflux picks up and people go looking for the Zantac they remember. What is on the shelf now is famotidine, the same active drug as Pepcid, and it has a dedicated pregnancy fact sheet showing no reported increase in birth defects.
• Third trimester. Late-pregnancy acid is the most common reason people reach for an H2 blocker at all. Whichever product you land on, a dose taken on a schedule usually holds better than one taken after symptoms start. Bring the actual box to your provider so the active ingredient, not the brand name, drives the decision.