Table 1.

Laboratory tests during the course of treatment, days after cessation

	Day 12	Day 14	Day 16	Day 25	Day 35	Day 47
Direct bilirubin (mg/dl)*	28.6	26.7	28.6	29.3	24.7	5.8
Urine mitragynine		Positive				Negative
Serum mitragynine (ng/l)	20	20

*1 mg/dl = 17.1 μmol/l