From the FDA Drug Label
If pregnant or breast-feeding, ask a health professional before use. The FDA drug label does not answer the question about the safety of peppermint cough medicine in pregnancy, but it does advise to ask a health professional before use of the mentioned drug, dextromethorphan, if pregnant or breast-feeding 1.
From the Research
Peppermint is generally considered safe for pregnant women as a natural cough remedy, and it can be used to help relieve cough symptoms during pregnancy, as supported by the most recent study 2. When using peppermint as a cough remedy during pregnancy, it is essential to use it in moderation and in the right form. You can use peppermint tea, lozenges, or inhale steam with a few drops of peppermint oil to help relieve cough symptoms.
- For tea, steep one teaspoon of dried peppermint leaves in hot water for 5-10 minutes and drink up to 3 cups daily.
- For steam inhalation, add 3-4 drops of peppermint oil to a bowl of hot water, place a towel over your head, and breathe deeply for 5-10 minutes. Peppermint works by providing a cooling sensation that can help soothe throat irritation and has mild decongestant properties. However, avoid concentrated peppermint oil supplements or excessive amounts as they may stimulate menstruation in high doses, as noted in the study 2. For more severe coughs during pregnancy, consult your healthcare provider before using any over-the-counter cough medications, as some ingredients like dextromethorphan or guaifenesin may be recommended in limited circumstances, while others like pseudoephedrine should be avoided, especially in the first trimester, as discussed in the study 3.