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Capsule/Tablet: The side effects reported include nervousness, agitation, irritability, anxiety and sleep disturbances. The incidence of these during clinical trials was ≤5% and they were more often noted in older patients taking >2.4 g daily. In the majority of cases, a dose reduction sufficed to make these symptoms disappear.
Some patients may complain of fatigue or drowsiness. Gastrointestinal problems eg, nausea, vomiting, diarrhoea and stomachache have also been reported but their incidence during clinical trials was ≤2%.
Other symptoms eg, vertigo, headaches, trembling and sexual stimulation have occasionally been reported.
Ampoule: Psychiatric: 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 may occur.
Digestive: Nausea, vomiting, abdominal discomfort, diarrhoea, gastralgia may occur.
Circulatory: Elevation or decrease in blood pressure may occur.
Others: Libido, weight gain, allergic reaction, redness, rash, hypersensitivity may occur.
