- Presence of aspartate aminotransferase (AST) levels greater than or equal to 3 X the upper limit of normal, alanine aminotransferase (ALT) levels greater than or equal to 3 X the upper limit of normal, total bilirubin greater than or equal to 1.5 X the upper limit of normal, or creatinine greater than 1.5 X upper limit of normal on the screening laboratory assessments