Hypotension, headache, palpitations, tachycardia, extrasystoles; hemolytic anaemia, thrombocytopenia, agranulocytosis; sedation, dizziness, disturbed coordination, fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesias, blurred vision, diplopia, vertigo, tinnitus, acute labyrinthitis, hysteria, neuritis, convulsions; epigastric distress, anorexia, nausea, vomiting, diarrhoea, constipation; urinary frequency, difficult urination, urinary retention, menses; thickening of bronchial secretions, chest tightness, wheezing, nasal stuffiness. Phenylephrine HCl: Reflex bradycardia. Chlorpheniramine maleate: Urticaria, drug rash, anaphylactic shock, photosensitivity, excessive perspiration, chills, dry mouth, nose & throat.