Oral: Nervousness, agitation, irritability, anxiety & sleep disturbances. Nausea, vomiting, diarrhoea & stomachache. Vertigo, headaches, trembling & sexual stimulation. IV: Psychiatric hyperkinesia, sleep disturbance, insomnia, nervousness, aggression, depressive emotional inversion, anxiety, irritability, agitation, drowsiness, decrease of seizure threshold, hyperactivity in children, dizziness, headache, tremor, fatigue. Nausea, vomiting, abdominal discomfort, diarrhoea, gastralgia. Elevation or decrease in BP. Libido, wt gain, allergic reaction, redness, rash, hypersensitivity.