Robitussin can be used cautiously by breastfeeding mothers to treat cold and cough, but it is essential to note its possible side effects. The active ingredient in Robitussin, guaifenesin, can pass into breast milk and affect the baby. Common side effects of taking Robitussin while breastfeeding include drowsiness, irritability, and decreased milk production. Therefore, nursing … Continue reading What are the Possible Side Effects of Taking Robitussin while Breastfeeding?