Determining the Effects of Observed and Self-Administered Drug Regimens in HIV Infected Adults

Poor adherence to HAART is usually associated with resistant virus. Poor adherence to HAART can have serious consequences, including limited treatment options for HIV infected individuals if they become infected with resistant HIV. The purpose of this study was to examine the effectiveness of modified directly observed therapy (mDOT) and compare it with the effectiveness of self-administered therapy (non-mDOT) in HIV infected individuals with first virologic failure on an NNRTI-based HAART regimen who were starting a PI-based HAART regimen at study entry.

mDOT was defined in this study as the daily observation of lopinavir/ritonavir (LPV/r) being taken on a regular basis. Observation consisted of an mDOT partner being present at the time the study participant took the observed dose. Half of the participants in this study were required to choose an mDOT partner to supervise adherence for the first 24 weeks of the study. Each mDOT partner completed the study-administered mDOT training program and was required to record all observed doses in an mDOT diary log. All participants and partners received health education through the study. Adherence was measured using Medication Event Monitoring System (MEMS) caps and self-report questionnaires.

This study lasted 52 weeks. Per protocol, participants were to be stratified according to their screening viral load and the proposed study treatment. The study treatment each participant received was based on their treatment history. At entry, participants were to start one of the two PI-based HAART regimens, either FTC/Tenofovir Disoproxil Fumarate (TDF) 200/300 mg once daily (QD) and Lopinavir/Ritonavir (LPV/RTV) 400/100 mg twice a day (BID) or TDF 300 mg QD and zidovudine (ZDV) 300 mg BID and LPV/RTV 400/100 mg BID. mDOT was used for the first 24 weeks of the study, followed by self-administration of study medications from week 25 to week 52. ZDV was not provided by the study. All enrolled participants except one who did not start study regimen initiated FTC/TDF and LPV/rtv after randomization. No participants started ZDV containing regimen on study. Thus, participants in this study were stratified by screening HIV-1 RNA only.

There were eight visits during the study. Medical and medication history, blood collection, and clinical assessment were required at all visits. A quality of life questionnaire and an adherence tools assessment were collected at most visits. For the mDOT arm, medication diary logs and mDOT partner monitoring were reviewed at most visits. An mDOT exit questionnaire and exit interview were required at the end of the study.

Inclusion criteria

for Participants:

• HIV infected
• Have experienced or currently experiencing first baseline virologic failure on first NNRTI-based HAART regimen with no history of virologic failure on another regimen OR discontinued first NNRTI-based HAART regimen without the recommendations of clinicians and currently experiencing virologic failure with no history of virologic failure on another regimen. More information on this criterion can be found in the protocol.
• Confirmed virologic failure within 45 days of study entry
• Receiving one of the following NNRTI-based regimens for at least 16 weeks prior to study entry: ZDV+3TC+NVP, ZDV+3TC+EFV, d4T+3TC+NVP or d4T+3TC+EFV
• Able to identify a close friend, relative, or spouse who is willing to serve as a partner
• Intend to stay in current geographical area of residence for the duration of the study
• Agree to use LPV/rtv with MEMS caps and take the tablets out of the container only at dosing
• Willing to use acceptable forms of contraception
• Ability and willingness of participant or legal guardian/representative to give written informed consent.
• Required laboratory values obtained within 45 days prior to study entry.
• Negative serum or urine pregnancy test obtained within 48 hours prior to study entry for women of reproductive potential.

Inclusion criteria

for Partners:

• Not a participant
• Friend, family member, or spouse who knows of the participant's HIV status. Partners do not have to live with participants.
• Willing to attend a 1- to 2-hour taped training session prior to study entry
• Willing to attend study visits with participant at study screening; entry; and Weeks 4, 8, 12, 24, and 52
• Willing to directly observe participant taking at least one dose of LPV/rtv for at least 5 days per week for 24 weeks after stratification of participant
• Willing to act as a positive support for participant
• Willing to notify clinical staff of participant's nonadherence to study assigned regimen
• Willing to notify clinical staff if they are unable to provide mDOT for 2 weeks or more
• Willing to complete medication diary logs
• Willing to complete exit interview
• Agree to have their training session taped (if required).
• For mDOT arm, willing to discuss and decide with participants whether to continue mDOT after Week 24
• At least 18 years old
• Understand that participants have agreed to use LPV/RTV with MEMS caps and take the tablets out of the container only at dosing
• Ability and willingness to give written informed consent.
• No intention to relocate away from current geographical area of residence for the duration of study participation.

Exclusion criteria

for Participants:

• Use of any immunomodulator, HIV vaccine, or other investigational therapy within 45 days of study entry
• Prior treatment with any PI
• Previously diagnosed cancer other than basal cell carcinoma and cutaneous Kaposi's sarcoma
• Use of rifampin or rifabutin within 45 days of study entry or plan use of rifampin or rifabutin
• Requirement for taking any medications that are prohibited by this study. More information on this criterion can be found in the protocol.
• Known allergy to the study medications or their formulations
• Current drug or alcohol use that, in the opinion of the investigator, would interfere with the study
• Acute illness requiring hospitalization within 14 days of study entry
• Active tuberculosis (TB) infection
• Currently incarcerated
• Participation as a partner in this study
• Participation with no access to telephones
• Abnormal laboratory values
• Pregnant, breastfeeding, or intend to become pregnant

Exclusion criteria

for Partners:

• A participant in this study
• Participation as a partner to any other participant
• No access to telephones
• Currently incarcerated