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Concept: Uricosuric

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To systematically review the evidence on the efficacy, safety, and cost-effectiveness of urate-lowering therapy for gout: xanthine oxidase inhibitors (allopurinol and febuxostat), uricosuric medications (benzbromarone, probenecid and sulfinpyrazone), and uricases (pegloticase and rasburicase).

Concepts: Gout, Allopurinol, Xanthine oxidase inhibitor, Uric acid, Xanthine oxidase, Uricosuric, Antigout agents, Probenecid

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Introduction: Gouty arthritis and hyperuricemia have ailed humans for centuries. Recent advances in understanding of the mechanism(s) of their development have changed our perception of the disease process. Despite these gains, the treatment options available are limited. The FDA approval of febuxostat for the treatment of hyperuricemia in gout has been a significant step forward. Since its approval in 2009, febuxostat has proven to be safe and efficacious although concerns remain regarding its long-term effects and superiority to other uricosuric agents, such as allopurinol. Areas covered: A comprehensive literature review of PubMed and Ovid examining clinical trials and post-marketing studies yielded congruent findings on efficacy and safety in elderly populations and those with mild-to-moderate renal/hepatic impairment. A lack of literature and clinical studies was found with regard to comparison of febuxostat to FDA-approved high-dose allopurinol (> 300 mg), the safety of febuxostat in the treatment of severe renal/hepatic impairment and the benefit in the treatment of secondary cases of hyperuricemia. Expert opinion: Febuxostat is effective in the treatment of mild-to-moderate renal/hepatic impairment with dramatic effects on the serum urate level. It can be used safely in patients with hypersensitivity reactions to allopurinol. Further research is needed to determine the long-term benefits and risks.

Concepts: Clinical trial, Effectiveness, Gout, Arthritis, Uric acid, Hyperuricemia, Hypouricemia, Uricosuric

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Although uricosuric agents provide the most time-honoured approach to the control of hyperuricemia, their place in the armamentarium has been eclipsed by that of xanthine oxidase inhibitors. This review considers the potential for uricosuric agents from the perspective of recent progress in the understanding of urate transport systems.

Concepts: Gout, Xanthine oxidase inhibitor, Uric acid, Hyperuricemia, Hypouricemia, Xanthine oxidase, Hyperuricosuria, Uricosuric