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Objectives: To perform, in real conditions of prescription, the medico-economic evaluation of infliximab in severe RA., Methods: A cost-effectiveness analysis of the annual costs was done with a comparison between the previous and the following year under infliximab. The effectiveness, determined from the HAQ, was expressed in clinically significant units and in quality-adjusted life years (QALYs). The incremental net benefit (INB), defined as willingness to pay (lambda), was used to express the results., Results: A cohort of 635 patients was formed. Before the use of infliximab, after 1 and 2 years, the mean annual cost per patient for the care of RA was 9832, 27,723 and 46,704 euro, respectively. Among the direct costs, infliximab accounts for 21,182 euro for the first year. The distribution of the different costs was similar after 2 years. By using the INB, the difference before and after 1 year under infliximab is significant, on average by 1.86 (S.E.M. = 0.76) when the effectiveness is expressed in clinically significant units. For severe HAQ, lambda is 9841 euro (18,593 for all HAQ). When it is expressed in QALYs, also for severe HAQ, lambda > 100,000 euro. This can be explained by a short follow-up although severe complication of RA appears later., Conclusion: An evaluation of the more long-term costs is required in order to determine whether there are any full economic benefits with this treatment.

The progress of immunopathology allowed the development of targeted drugs or biotherapies. Among them, monoclonal antibodies against T or B lymphocytes or against a cytokine are reported. Monoclonal anti-TNF antibodies are a major therapeutic advance because they can stop the clinical, biological and radiographic evolution of rheumatoid arthritis (RA). Monoclonal anti-CD20 lymphocytes give promising results; they are able to induce prolonged remissions. Monoclonal anti-IL6 receptors are currently being evaluated. They are efficacious in adult RA and in Still's disease. Because of the infectious risk linked to these drugs, the ratio benefit/risk must be carefully evaluated before the prescription of a biotherapy.

Anti-tumor necrosis factor-a (anti-TNF-a) therapy strategies result in significant clinical benefits in patients with rheumatoid arthritis, but with an increased rate of serious infectious diseases. We describe a patient receiving infliximab who developed a primary cutaneous Nocardia otitidiscaviarum infection after a skin injury.

Reasons for using TNFalpha inhibitors in rheumatoid arthritis Available agents modulating TNFalpha Adverse effects to TNFalpha inhibitors Which patients should be treated with TNFalpha inhibitors? Monitoring treatment with TNFalpha inhibitors Patient follow-up Open questions Conclusions