Fig. 5

Relationship between CYP3A4 activity and serum rifampicin concentration in the long-term. Relationships between the ratio of urinary 6β-hydroxycortisol/cortisol (6βOHF/F) and serum concentrations of rifampicin (RFP). Symbols represent values on days 1 to 365 (n = 4, mean ± SE)