Pharmacokinetics of rilpivirine and 24-week outcomes after switching from efavirenz in virologically suppressed HIV-1-infected adolescents.

Abstract:

BACKGROUND:Rilpivirine (RPV), a non-nucleoside reverse transcriptase inhibitor drug, could be a favourable drug for maintenance therapy in HIV-infected adolescents because it has few long-term side effects. However, data among adolescents switching from efavirenz (EFV) to RPV are limited. This study investigated the pharmacokinetics (PK), safety and efficacy of RPV in virologically suppressed HIV-1-infected adolescents after switching from EFV. METHODS:Adolescents aged 12-18 years on EFV-based antiretroviral therapy (ART) were switched from EFV to RPV (25 mg, once daily). Intensive 24-h blood samplings at 0 (pre-dose), 1, 2, 4, 5, 6, 9, 12 and 24 h were performed 4 weeks after switching. PK parameters were calculated using a non-compartmental method and compared with published data from the PAINT and pooled ECHO/THRIVE substudies. HIV RNA level was measured at weeks 12 and 24. Biochemical profiles were measured at baseline and week 24. RESULTS:From January to June 2016, 20 adolescents (12 male) were enrolled. Median (IQR) age was 16 (15-17) years and weight was 49 (42-59) kg. Mean (sd) AUC24 h, C24 h and Cmax of RPV were 2,041 (745) ng•h/ml, 69 (29) ng/ml and 143 (65) ng/ml, respectively. Median (IQR) Tmax was 5 (2-9) h. Four adolescents had C24 h <40 ng/ml. All PK parameters were comparable with published data. All adolescents remained virologically suppressed at week 24. Significant decreases in fasting total cholesterol, triglyceride and low-density lipoprotein were observed (P-value <0.05). CONCLUSIONS:Virologically suppressed HIV-infected adolescents had adequate RPV exposure and remained virologically suppressed after switching from EFV. RPV can be used as long-term maintenance ART in HIV-infected adolescents.

journal_name

Antivir Ther

journal_title

Antiviral therapy

authors

Jantarabenjakul W,Anugulruengkitt S,Kasipong N,Thammajaruk N,Sophonphan J,Bunupuradah T,Cressey TR,Colbers A,Burger DM,Phongsamart W,Puthanakit T,Pancharoen C,HIVNAT 220 study.

doi

10.3851/IMP3198

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

259-265

issue

3

eissn

1359-6535

issn

2040-2058

journal_volume

23

pub_type

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