GGTLC1 and Hyperbilirubinemia: In addition, lopinavir/ritonavir has been associated with abnormalities in lipid metabolism; multiple gastrointestinal symptoms, such as diarrhea, abnormal stools, abdominal pain, nausea and vomiting [36,38]; hyperbilirubinemia and increased GGT (Gamma-Glutamyl Transpeptidase) [30].