From the Research
Mucinex DM is generally considered safe for use during breastfeeding, but caution is advised. The active ingredients in Mucinex DM are guaifenesin (an expectorant) and dextromethorphan (a cough suppressant). Guaifenesin is considered compatible with breastfeeding as minimal amounts pass into breast milk. Dextromethorphan also transfers into breast milk in small amounts and is unlikely to cause problems in most nursing infants, as stated in a recent study on medication safety in breastfeeding 1. However, it's best to take the lowest effective dose for the shortest duration needed to manage symptoms. If possible, take the medication immediately after nursing to maximize the time before the next feeding, which can minimize infant exposure.
Some key points to consider when taking Mucinex DM during breastfeeding include:
- Watching for any unusual drowsiness or irritability in your baby after taking this medication
- Consulting with your healthcare provider before use, especially if your baby is premature, newborn, or has any health conditions
- Considering alternative non-medication approaches like staying hydrated, using a humidifier, and saline nasal sprays to manage symptoms with no risk to your nursing infant. According to 1, resources like LactMed can provide safety information for many medications and are available free online, which can be helpful in making informed decisions about medication use during breastfeeding.