PMID- 26379163 OWN - NLM STAT- MEDLINE DCOM- 20161017 LR - 20201209 IS - 1532-0987 (Electronic) IS - 0891-3668 (Linking) VI - 34 IP - 12 DP - 2015 Dec TI - Efavirenz Capsule Sprinkle and Liquid Formulations With Didanosine and Emtricitabine in HIV-1-infected Infants and Children 3 Months to 6 Years of Age: Study AI266-922. PG - 1355-60 LID - 10.1097/INF.0000000000000913 [doi] AB - BACKGROUND: AI266-922 was an open-label, dose-ranging study that assessed the pharmacokinetics, safety and efficacy of efavirenz (EFV) in children (3 months to 6 years). METHODS: Antiretroviral-naive and antiretroviral-experienced HIV-1-infected children received once-daily EFV as oral solution or capsule sprinkle plus didanosine and emtricitabine (FTC). Pharmacokinetic analyses were undertaken at week 2 and repeated at weeks 10 and 18 after an EFV dose change or switch from oral solution to capsule sprinkle. RESULTS: Thirty-seven subjects were treated. EFV area under the plasma concentration-time curve over 1 dosing interval from time 0 to 24 hours postdose values were generally suboptimal (<110 muM x h) in subjects younger than 3 years treated with oral solution; these subjects switched to capsule sprinkle. Twenty of 21 subjects younger than 3 years treated with capsule sprinkle achieved an EFV area under the plasma concentration-time curve over 1 dosing interval from time 0 to 24 hours postdose value >110 muM x h, although higher initial doses were administered in this age group. Interpatient variability in EFV exposure was high. By week 48, 77.8% and 63.0% of subjects achieved HIV-RNA <400 and <50 copies/mL, respectively. Median changes in log10 HIV-RNA and CD4 percentage from baseline were -3.18 copies/mL and +6%, respectively. Two (5.4%) patients discontinued because of adverse events (AEs). Serious AEs occurred in 20 (54.1%) subjects. Common AEs were diarrhea (49%), nasopharyngitis (35%) and pneumonia (30%). Overall, 43% of subjects with suboptimal EFV exposure at week 2 developed resistance. CONCLUSIONS: Once-daily EFV, given as capsule sprinkle, achieved target exposures in this study although doses were 2-3 times higher than Food and Drug Administration-approved doses for children younger than 3 years. These data are useful for dose selection modeling and simulation; however, Food and Drug Administration-approved doses should be used clinically. EFV + didanosine + FTC was efficacious with no new pediatric safety findings reported. FAU - Pavia-Ruz, Noris AU - Pavia-Ruz N AD - From the *Hospital Infantil de Mexico Federico Gomez, Mexico City, Mexico; daggerFamily Clinical Research Unit, Tyberberg Children's Hospital, Cape Town, South Africa; double daggerUniversidad Panama School of Medicine, Hospital del Nino de Panama, Panama City, Panama; section signHIV Netherlands Australia Thailand Research Collaboration (HIV-NAT), Thai Red Cross AIDS Research Centre (TRCARC), Bangkok, Thailand; paragraph signBristol-Myers Squibb, Wallingford, Connecticut; ||Bristol-Myers Squibb, Hopewell, New Jersey; and **Bristol-Myers Squibb, Plainsboro, New Jersey. FAU - Rossouw, Magdel AU - Rossouw M FAU - Saez-Llorens, Xavier AU - Saez-Llorens X FAU - Bunupuradah, Torsak AU - Bunupuradah T FAU - Taylor, Mathew AU - Taylor M FAU - Yang, Rong AU - Yang R FAU - Sevinsky, Heather AU - Sevinsky H FAU - Krystal, Mark AU - Krystal M FAU - Lataillade, Max AU - Lataillade M FAU - Seekins, Daniel AU - Seekins D FAU - Biguenet, Sophie AU - Biguenet S LA - eng SI - ClinicalTrials.gov/NCT00364793 PT - Clinical Trial, Phase II PT - Journal Article PT - Multicenter Study PL - United States TA - Pediatr Infect Dis J JT - The Pediatric infectious disease journal JID - 8701858 RN - 0 (Alkynes) RN - 0 (Benzoxazines) RN - 0 (Cyclopropanes) RN - G70B4ETF4S (Emtricitabine) RN - JE6H2O27P8 (efavirenz) RN - K3GDH6OH08 (Didanosine) SB - IM MH - Alkynes MH - Benzoxazines/administration & dosage/pharmacokinetics/*therapeutic use MH - Child, Preschool MH - Cyclopropanes MH - Didanosine/administration & dosage/pharmacokinetics/*therapeutic use MH - Emtricitabine/administration & dosage/pharmacokinetics/*therapeutic use MH - Female MH - HIV Infections/*drug therapy/epidemiology MH - Humans MH - Infant MH - Male MH - Prospective Studies EDAT- 2015/09/18 06:00 MHDA- 2016/10/19 06:00 CRDT- 2015/09/18 06:00 PHST- 2015/09/18 06:00 [entrez] PHST- 2015/09/18 06:00 [pubmed] PHST- 2016/10/19 06:00 [medline] AID - 10.1097/INF.0000000000000913 [doi] PST - ppublish SO - Pediatr Infect Dis J. 2015 Dec;34(12):1355-60. doi: 10.1097/INF.0000000000000913.