Somnolence, anorexia, dizziness, headache, nausea, agitation/irritability, fatigue &/or ataxia, difficulty concentrating, difficulty w/ memory, mental slowing, vomiting, & wt loss; accidental injury, asthenia; tremor, convulsions, abnormal gait, hyperesthesia, incoordination; pharyngitis, cough increased; pruritus; amblyopia, tinnitus.