Montelukast can be taken while breastfeeding. Montelukast is an antidiarrheal drug that acts on the intestinal mucosa and does not enter the bloodstream. Montelukast mainly acts on the intestinal mucosa and has a protective effect on the intestinal mucosa, in addition, it can also adsorb germs and toxins, so as to play a good antidiarrheal effect, and it is a commonly used antidiarrheal drug in the clinic. Breastfeeding women can eat Montelukast, because Montelukast acts through the intestinal mucosa and does not enter the bloodstream, so it will not affect the breast milk, thus affecting the breastfeeding of the fetus, and there is no adverse reaction to the fetus. It should be noted that, after taking montelukast, there are uncomfortable symptoms or allergic to montelukast is prohibited. Breastfeeding is a very special stage, if there are uncomfortable symptoms, please do not self-medication, but timely medical consultation, follow the doctor’s instructions for medication.