Omeprazole and pregnancy

This last year I had h-pylori and was treated for it and also had to take omeprazole for the stomach acid. I occasionally still get really bad stomach acid and will take an omeprazole.
Recently my husband and I have began trying to get pregnant, and I think I may be. I will test around the 7th of the month. I have been taking folic acid, avoiding alcohol, caffeine, I do not smoke, I have cut out certain foods and have been doing everything as if I were pregnant. However, I completely spaced it about the omeprazole and took one the other night when I had terrible stomach acid. If I am pregnant, I am probably only about 3 weeks. Would one omeprazole severely affect the developing fetus? Should I be worried?

[Ratnakar Kini, MD]

Hi,
Omeprazole should be avoided during pregnancy.
It is a category C drug.

Category C drug -
Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

So no need to worry about that one dose.