Is sumatriptan safe during pregnancy?

What does the evidence say about sumatriptan during pregnancy?

1. Studies have not found an increased chance of birth defects when sumatriptan was taken during pregnancy. 1
2. Studies have not found an increased chance of miscarriage with sumatriptan, though some research suggested a modest rise in preterm delivery with later use, an outcome that is also linked to migraine itself. 1
3. In a Norwegian cohort of 69,929 pregnancies, first-trimester triptan therapy showed no significant association with major congenital malformations, with an adjusted odds ratio of 1.0. 2
4. That same Norwegian cohort found second- or third-trimester triptan use associated with atonic uterus and with blood loss over 500 mL during labor. 2
5. ACOG notes triptans can be used while breastfeeding, that small amounts pass into breast milk, and that an ob-gyn may suggest waiting several hours after a dose before nursing. 3

Is sumatriptan safe in each trimester?

• First trimester. This is the window most people worry about, and it is also where the evidence is strongest. A Norwegian cohort of nearly 70,000 pregnancies found no significant link between first-trimester triptan use and major malformations. Acetaminophen is still the usual first step, with sumatriptan held for attacks it does not reach.
• Second trimester. Migraine often eases in the second trimester as hormones settle, so this is a natural point to review how many attacks you are actually having and how often you are reaching for a triptan. Frequency matters more than any single dose when your clinician is weighing options.
• Third trimester. Later triptan use has been linked to a modest rise in preterm delivery in some research, an outcome also tied to migraine itself, and one large cohort found associations with atonic uterus and heavier blood loss during labor. Any severe new headache this late needs same-day evaluation, since it can signal preeclampsia.