Singulair 5mg is a pediatric medication containing Montelukast sodium, manufactured by MSD. It comes in a calendar pack containing 28 chewable tablets, with each tablet containing 5mg of the active ingredient. This is a prescription-only medication in chewable tablet form specifically designed for pediatric use. The calendar pack format helps track daily doses. The product is manufactured by Merck Sharp & Dohme Limited (MSD) and contains montelukast sodium as the active ingredient.