Singulair (Montelukast) 10mg is a prescription medication manufactured by MSD, containing 28 film-coated tablets in a calendar pack format. Each tablet contains 10mg of the active ingredient Montelukast sodium for the treatment and prevention of asthma and allergy symptoms. This prescription-only medication comes in a convenient calendar pack to help track daily doses. The film-coated tablets contain Montelukast sodium as the active ingredient. Singulair is produced by Merck Sharp & Dohme (MSD), a trusted pharmaceutical manufacturer.