Is Robitussin safe during pregnancy?

What does the evidence say about Robitussin during pregnancy?

1. Using dextromethorphan during pregnancy, including in the first trimester, isn't expected to raise the chance of birth defects above the roughly 3% background rate seen in the general population. 1
2. A controlled study of 184 pregnant dextromethorphan users, 128 of them in the first trimester, found major malformation rates nearly identical to women who weren't exposed: 2.3% versus 2.8%. 2
3. That same study found closely matched average birth weights between the exposed and unexposed groups, about 3,381 g versus 3,446 g, with no sign of growth problems at typical cough-medicine doses. 2
4. Some liquid dextromethorphan products contain alcohol, so it's worth reading the full ingredient label rather than assuming every cough bottle is the same formula. 1
5. Guaifenesin, the expectorant paired with dextromethorphan in formulas like Robitussin DM, has less pregnancy data than dextromethorphan alone. Any product containing it should be alcohol-free, and its effects on preterm delivery or birth weight haven't been separately studied. 3

Is Robitussin safe in each trimester?

• First trimester. A group of 128 women who used dextromethorphan specifically in the first trimester showed no increase in miscarriage. The same caution applies in every trimester: read the full label, since 'Robitussin' covers several different formulas, not just one product.
• Second trimester. No second-trimester-specific concern shows up in the available data, so the guidance stays the same as the first trimester. A cough lasting more than about a week, or one with fever or chest tightness, is a reason to call your provider rather than reach for another over-the-counter ingredient.
• Third trimester. The research doesn't flag a distinct third-trimester issue with dextromethorphan at typical over-the-counter doses. Since your care team may want to know about any medication used close to delivery, mention ongoing cough medicine use at your next visit rather than assuming it's automatically fine to keep taking.