After being informed about the study and potential risks, all legal guardians giving written informed consent will undergo check eligibility to enroll the study entry. Patients will be sort into 3 weight band groups 6 to below 10 kg, 10 to below 14 kg, and 14 to below 20 kg. ARTs will be switched to DTG dispersible tablet and ABC/3TC once daily will be prescribed according to weight band dosage. Total of 7 time point of blood sampling for plasma DTG concentrations will be measure at 7-14 day after medication switch. Patient will be follow up as schedule for total 24 week to assess safety, and efficacy of DTG dispersible tablet combine with ABC/3TC.
The purpose of this study is to evaluate steady-state pharmacokinetics of DTG dispersible tablets in children with HIV infection weighing from 6 to below 20 kg and to determine the dose of DTG that achieves adult target PK parameter(trough concentration; AUC24h)