patients. However, adverse effects play a major role in adherence to HAART. Some
protease inhibitors (mainly atazanavir and indinavir) act as inhibitors of uridine diphosphate-
glucuronosyltransferase (UGT1A1), the enzyme responsible for hepatic conjugation of
bilirubin. Variations in the promoter region of the UGT1A1 gene (UGT1A1* 28, rs8175347)
can influence bilirubin plasma levels, modulating the susceptibility to hyperbilirubinemia …