Psychiatric/neurologic: CNS depression, drowsiness, sedation ranging from mild drowsiness to deep sleep (most frequent), dizziness, lassitude, disturbed coordination; less commonly, restlessness, insomnia, tremors, euphoria, nervousness, irritability, delirium, seizures, toxic psychosis, paresthesia Muscular: Weakness Cardiovascular: Palpitation, tachycardia, palpitation, ECG changes (eg, widened QRS), arrhythmias (eg, extrasystole, heart block), hypotension, hypertension, dizziness, sedation, hypotension GI: Epigastric distress, anorexia, nausea, vomiting, diarrhea, constipation Hepatic: Cholestasis, hepatitis, hepatic failure, hepatic function abnormality, jaundice (rare) Skin: Eczema, pruritus, inflammation, papular rash, erythema on exposed skin Sensory: Visual disturbances, blurred vision, diplopia, tinnitus, acute labyrinthitis Renal: Dysuria, urinary retention Respiratory: Thickening of bronchial secretions, wheezing, nasal...
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