Effect of Efavirenz on Endogenous Progesterone Concentrations and Contraceptive Outcomes among Ugandan HIV Infected Women Coadministering Ethinylestradiol/Levonorgestrel

Figure 1

Variation of endogenous progesterone concentrations with efavirenz concentrations for 30 HIV infected women coadministering efavirenz and oral pills. Four women on HAART (outliers) were excluded in this analysis. There is a nonsignificant positive linear relationship between progesterone and efavirenz for efavirenz concentrations below 12 µg/ml. Above 12 µg/ml of efavirenz, progesterone begins to fall though it is not significant.