Pravastatin in HIV-infected patients treated with protease inhibitors: a placebo-controlled randomized study

Abstract

Purpose: The objectives of the study were to assess the effects of pravastatin on plasma HIV RNA, lipid parameters, and protease inhibitor (PI) concentrations in patients treated with PI-containing regimens and with total cholesterol (TC) > or = 5.5 mmol/L.

Method: A clinical trial including patients randomized to receive pravastatin or matching placebo for 12 weeks was implemented.

Results: Twelve patients were included in the pravastatin group and 9 in the placebo group. At week 12 (W12), no patient had experienced virological failure. Between week 0 (W0) and W12, the median differences for TC were -1.4 mmol/L in the pravastatin group and +0.2 mmol/L in the placebo group (p = .005); for LDL, they were -1.0 mmol/L and +0.3 (p = .007), respectively. A significant decrease of the PI concentration (12 hours after administration) ratio W12 - W0/W0 was noticed in the pravastatin group (-0.2 [interquartile range, -0.3 to -0.1] as compared with the placebo group (0.1 [IQR, 0.0 to 0.3]) (p = .03). When the study was restricted to patients treated with lopinavir/ritonavir, a decrease from 3.8 microg/mL at baseline to 2.9 mug/mL at W12 was noticed in the pravastatin arm (p = .04) but not in the control arm (p = 1.00). No clinical adverse event reached a severity of grade 3.

Conclusion: We observed in this study that the use of pravastatin in PI-treated patients was not associated with major change in the plasma HIV RNA on 12 weeks of follow-up. However, we found a trend of decrease of the trough PI concentration at W12, suggesting a possible drug-drug interaction of pravastatin on PI metabolism.