A Single-arm, Open-label Study of the Safety and Reduction of Signs and Symptoms During Treatment With Tocilizumab in Combination With Methotrexate, in Patients With Moderate to Severe Active Rheumatoid Arthritis

This single arm, open-label study will assess the safety and efficacy with regar d to reduction of signs and symptoms of treatment with tocilizumab in combinatio n with methotrexate, in patients with moderate to severe active rheumatoid arthr itis. Patients will receive tocilizumab 8mg/kg iv, every 4 weeks and methotrexat e 10-25mg weekly. The anticipated time on study treatment is 3-12 months, and th e target sample size is \<500 individuals.