Phenylephrine+Chlorpheniramine Maleate+Dextromethorphan Hydrobromide may make you feel drowsy or may cause you to fall asleep during your daily activities. Avoid driving a car, operating machinery, working at heights or participating in potentially dangerous activities at the beginning of your treatment until you know how the medicine affects you. Inform your doctor if you experience such episodes while taking this medicine.                                             SIDE EFFECTS :                                                                                                                                                                      Insomnia (difficulty in sleeping),  Vomiting, Headache, Nausea, Sedation, Double vision, Diarrhea, Dryness in mouth, Nervousness, Decreased appetite, Heartburn, Dizziness, Weakness, Discomfort when urinating, Polyuria, Urinary retention, Hallucination, Convulsion .