Insomnia, nervousness; headache. Nasopharyngitis; anorexia, decreased appetite, moderately reduced wt & height gain during prolonged use in childn; affect lability, aggression, agitation, anxiety, depression, irritability, abnormal behaviour, panic attack & stress in adults, bruxism; dizziness, dyskinesia, psychomotor hyperactivity, somnolence; arrhythmia, tachycardia, palpitations; HTN; cough, pharyngolaryngeal pain; abdominal pain, diarrhoea, nausea, stomach discomfort, vomiting, dry mouth, dyspepsia & toothache in adults; alopecia, pruritus, rash, urticaria, hyperhidrosis; arthralgia; pyrexia, growth retardation during prolonged use in childn; BP & heart rate changes (usually an increase), decreased wt.