Pharmacy-refill measure of adherence to efavirenz can predict maintenance of HIV viral suppression

P. Saberi, N. Caswell, M. Amodio-Groton, Peter L. Alpert

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The objective of this study was to determine if a lower rate of adherence (<95%) is sufficient to maintain HIV viral suppression in patients on an efavirenz-based regimen. This study was a retrospective review of pharmacy refill records at an HIV specialty pharmacy at Montefiore Medical Center's outpatient clinic. Data from 151 HIV-positive patients on an efavirenz-based regimen with at least one undetectable viral load (HIV RNA <400 copies/mL) from December 2003 through March 2005 were reviewed. Adherence was calculated based on the formula: [(pills dispensed/pills prescribed per day/days between refills) x 100%]. Calculated adherence for each time-period was correlated to the respective HIV-RNA value for that period. Of 151 patients, viral suppression was maintained in greater than 80% of time periods for adherence rates as low as 85-90%. The periods with 75-80% adherence also had higher than 85% suppression. Rates of suppression began to fall when adherence decreased to <75%. In conclusion, lower adherence rates (<95%) on an efavirenz-based regimen were more successful in maintaining viral suppression than previously found with unboosted protease inhibitor-based regimens.

Original languageEnglish (US)
Pages (from-to)741-745
Number of pages5
JournalAIDS Care - Psychological and Socio-Medical Aspects of AIDS/HIV
Volume20
Issue number6
DOIs
StatePublished - Jul 2008
Externally publishedYes

Fingerprint

efavirenz
suppression
Maintenance
HIV
RNA
outpatient clinic
Ambulatory Care Facilities
Protease Inhibitors
Viral Load

Keywords

  • Adherence
  • Efavirenz
  • Pharmacy
  • Refill

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health(social science)
  • Health Professions(all)
  • Social Sciences (miscellaneous)

Cite this

Pharmacy-refill measure of adherence to efavirenz can predict maintenance of HIV viral suppression. / Saberi, P.; Caswell, N.; Amodio-Groton, M.; Alpert, Peter L.

In: AIDS Care - Psychological and Socio-Medical Aspects of AIDS/HIV, Vol. 20, No. 6, 07.2008, p. 741-745.

Research output: Contribution to journalArticle

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