- SGPT less than 10 times the upper limit of normal NOTE: Women with a Grade 2 or Grade 3 SGPT value (between 2.6 and 10 times the upper limit of normal) were allowed on study; they were monitored monthly until delivery. If at any point their SGPT value rose to a Grade 4 (more than 10 times the upper limit of normal), they should not be dosed with the Study Drug.