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Can I take olmesartan during pregnancy?

Olmesartan is blood-pressure lowering medicine that belongs to a class of medicines called angiotensin receptor-blockers (ARBs). It is used for the treatment of hypertension and works by blocking hormones involved in blood vessel narrowing. All drugs that work on the angiotensin system, including olmesartan, can cause serious harm to a developing fetus, particularly if it is taken during the second and third trimesters. If you become pregnant while taking olmesartan your medication should be changed immediately. There have been many documented cases of fetal harm, including low blood pressure, deformities, birth defects, poor lung development, kidney failure, and death. The babies can be born prematurely. Olmesartan has been classified by the Food And Drug Administration (FDA) in Pregnancy Category C if taken during the first trimester and Pregnancy Category D when taken during the second and third trimester. This means that there is solid evidence that it can cause fetal harm in humans.

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