peripheral neuropathy (2.8% vs 1.8%), headache (2.7% vs 4.1%) convulsion (0.3% vs 0.5%), syncope (0.3% vs 0.3%), amnesia (0.2% vs 0.2%), tremor (0.2% vs 0.3%), somnolence (0.7% vs 0.5%), paraesthesia (0.7% vs 0.7%), hypoaesthesia (0.3% vs 0.2%), hypersomnia (0.2% vs 0%)