Do you screen for HLA-B*5801 prior to starting allopurinol in patients of backgrounds other than Asian or African-American?

The guidelines now recommend checking for the presence of the HLA-B*5801 gene only in Asians and African-Americans. However, in our clinic, we are checking for the presence of this gene on everybody who becomes a candidate to receive allopurinol, partly due to the fact that we are doing a study. Int...