Uncommon side effects include: dizziness; weakness; reduced coordination of movements; unsteadiness and/ or falls (ataxia); decreased concentration; apathy; restlessness; depression; agitation; irritability; confusion, abnormal thinking and behaviour (extroversion that seems out of character, decreased inhibition, aggressiveness, rages, delusion, depersonalisation, psychosis); nightmares; hallucinations; double vision or other sight problems; increased sensitivity to noise (hyperacusis); smell disorder (parosmia); speech disorders, including slurred speech; numbness, e. g. in the extremities (hypoaesthesia); nausea; decreased appetite; increased sensitivity to light (sunlight, UV light); feeling vaguely ill (malaise).