Insomnia/sleeplessness; nervousness; increased/decreased BP; tremor. Phenylephrine HCl: Anxiety, nervousness, dizziness, restlessness, arrhythmia, palpitation; pallor; resp distress; weakness. Chlorphenamine maleate: Facial dyskinesia, faintness, headache, paresthesia, blurred vision, diplopia, visual disturbance; acute labyrinthitis, tinnitus, vertigo; chest tightness; thickening of bronchial secretions, nasal stuffiness, wheezing; constipation, diarrhea, GI discomfort, nausea, vomiting; muscle weakness; difficulty urinating; early menses, impotence; chills, dryness of the mouth, nose, & throat; irritability, sweating. Paracetamol: Change in number of WBC & platelets; allergic reactions which may cause difficulty in breathing, skin rash, angioedema; minor stomach & intestinal disturbances, rare cases of serious skin reactions.