Merck Canada manufactures drugs in the treatment of a•allergic rhinitis •allergies •asthma b•bronchospasm associated with COPD c•chronic bronchitis (COPD) •COPD e•emphysema (COPD) •exercise-induced bronchospasm h•hay fever n•nasal polyps •non-small cell lung cancer p•perennial rhinitis •pneumonia r•rhinitis s•seasonal allergies •seasonal rhinitis •sleep apnea y•year-round allergies

Drugs manufactured by Merck Canada include

A•Asmanex®Twisthaler® K•Keytruda® N•Nasonex® Nasal Spray P•Pneumovax 23® vaccine S•Singulair® chewable tablets •Singulair® oral granules •Singulair® oral tablets V•Vaxneuvance® Z•Zenhale®