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HIV Med ; 17(5): 390-6, 2016 May.
Article in English | MEDLINE | ID: mdl-26688004

ABSTRACT

OBJECTIVES: Simplification of antiretroviral therapy enhances a patient's adherence but a new formulation could also lead to new adverse events and changes in daily routine. This study compared medication adherence, tolerance and satisfaction among subjects switching from a two-tablet tenofovir/emtricitabine/efavirenz regimen to a one-tablet regimen. METHODS: Clinical and sociodemographic data were collected and three surveys were administered at month 0 (=switch), and then 1 and 4-6 months after the switch: the Beliefs about Medicines Questionnaire, the HIV-symptom index questionnaire, the Short HIV Treatment Satisfaction Questionnaire, the Swiss HIV Cohort Study (SHCS) two-item adherence questionnaire, and a questionnaire on daily combination antiretroviral therapy (cART) management. Medication adherence of a subgroup of subjects was routinely monitored using an electronic device (MEMS(™) ). RESULTS: Eighty-eight subjects gave informed consent to participate in the study. The subjects' back-switch rate was 7% (six of 88). Subjects who did not back-switch preferred the one-tablet regimen (median = 2; IQR = 1.3-2.5; on a -3 to 3 scale), but no change in adherence was found (10 of 46 nonadherent subjects; P = 1.00). The perception of treatment necessity score decreased (P = 0.004), the efavirenz blood level increased (14%; P = 0.04), and association/dissociation of cART with food intake evolved (P = 0.01) after the switch. Subjects listed equivalent numbers of symptoms during the three visits. CONCLUSIONS: The one-tablet regimen was preferred but the number of back-switches was not negligible. The perception of treatment necessity score decreased with the simplification of the regimen from a two-tablet to a one-tablet formulation, which could negatively impact adherence. Switching is a sensitive time in a patient's treatment life and professionals should pay particular attention to patient's perceptions of treatment during such a transition.


Subject(s)
Benzoxazines/administration & dosage , Emtricitabine/administration & dosage , HIV Infections/drug therapy , Medication Adherence , Patient Satisfaction , Tenofovir/administration & dosage , Adult , Alkynes , Benzoxazines/therapeutic use , Cohort Studies , Cyclopropanes , Drug Administration Schedule , Drug Combinations , Emtricitabine/therapeutic use , Female , Health Surveys , Humans , Male , Medication Adherence/statistics & numerical data , Middle Aged , Patient Satisfaction/statistics & numerical data , Prospective Studies , Tablets , Tenofovir/therapeutic use , Treatment Outcome
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