Symptoms of allergies , common cold , flu-induced sinus , and ear , or other respiratory illnesses such as sinusitis and bronchitis. This medicine works by reducing the rash on the nose and ears which makes breathing easier and reduces any discomfort. Mild upset stomach , mild beheading , trips , mood swings , sleep problems , dizziness , tremors , headaches , nervousness or rapid and irregular heartbeat may occur as side effects of this medication.