reduces tissue  hyperemia ,  edema , and  nasal congestion  commonly associated with  colds  or  allergies . Other beneficial effects may include increasing the drainage of  sinus  secretions, and opening of obstructed  Eustachian tubes . Side Effect: Common adverse drug reactions (ADRs) associated with pseudoephedrine therapy include:  CNS  stimulation, insomnia, nervousness, excitability, dizziness