I de kliniske undersøgelser var de almindeligste bivirkninger hovedpine (optrådte hos 9% af patienterne), træthed (6%), svimmelhed (4%) og kvalme (3%).
In clinical studies, the most common side effects were headache (seen in 9% of patients), fatigue (tiredness, 6%), dizziness (4%) and nausea (feeling sick, 3%).