Febuxostat has shown a greater reduction in the levels of uric acid than fixed-dose (300 mg/d) allopurinol. With no titration of this dose, it is possible that the compared efficacy of febuxostat is overestimated.
This drug has not proven more effective than allopurinol in reducing the frequency of gout attacks.
The long-term safety profile is unknown, in particular with regard to cardiac-related events and other affectations of the liver, blood and thyroid gland. Cases of severe hypersensitivity including Stevens Johnson syndrome, acute anaphylaxis and shock, and liver failure have been notified.
The cost of treatment with febuxostat is much higher than allopurinol.