"Suddafed or pseudoephedrine is a oral decongestant that acts by constricting the blood vessels in your sinuses reducing inflammationSingular or montelukast is a leukotriene antagonist, meaning it blocks the action of leukotrienes which are a chemical released by some types of white blood cells when they detect an allergen.Zyrtec is a second generation antihistamine and benadryl is a first generati" . . . .