Is Diflucan safe during pregnancy?

What does the evidence say about Diflucan during pregnancy?

1. A single 150 mg dose for a yeast infection isn't expected to raise the chance of birth defects, while high doses taken for weeks at a time have caused a distinct pattern of birth defects in a small number of children. 1
2. That high-dose birth-defect pattern includes things like cleft palate, unusual facial features, and heart defects, and it shows up with doses of 400 to 800 mg a day taken through most of the first trimester, not with a single normal-strength dose. 2
3. The standard 150 mg or 300 mg dose didn't show a higher overall rate of birth defects in a large Danish study, though it did flag a possible link to a specific heart defect called tetralogy of Fallot. 3
4. Taking oral fluconazole between about week 7 and week 22 of pregnancy was linked to a higher chance of miscarriage in a Danish study of 1.4 million pregnancies. 4
5. Even low doses of fluconazole showed a heart-defect risk when nine studies were pooled together in a 2021 review, leading researchers to conclude it should be prescribed cautiously in pregnancy and in women who could become pregnant. 5

Is Diflucan safe in each trimester?

• First trimester. Most people dealing with a yeast infection this early are steered toward a topical antifungal cream first, since the first trimester is when your baby's major organs are forming. If a single low dose of oral fluconazole is used instead, the largest studies haven't found a clear rise in overall birth defects, though a couple of reviews flagged a small uptick in certain heart defects worth asking your provider about.
• Second trimester. Research has linked oral fluconazole use between about week 7 and week 22 to a higher chance of miscarriage, so this window deserves an extra conversation with your provider before starting it. A topical cream stays the more cautious first step if a yeast infection shows up now.
• Third trimester. There's less research on fluconazole use this late in pregnancy, and none of the major studies point to a specific third-trimester concern. Whatever the timing, ask your provider whether a topical option can handle the infection before reaching for a pill.