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Adverse Drug Reactions and Clinical Outcomes in Patients Initiated on Antiretroviral Therapy: A Prospective Cohort Study From Ethiopia

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Abstract

Introduction

In Ethiopia, the use of antiretroviral therapy (ART) has been scaled up for HIV/AIDS over the past decade. Adverse drug reactions (ADRs) associated with ART pose a unique challenge in the treatment of the infection in this resource-limited setting.

Objectives

The aims of this study were to examine the incidence and nature of ADRs, identify the risk factors associated with the development of ADRs, and assess their impact on treatment outcomes.

Methods

A prospective cohort study was conducted in adult patients (≥18 years of age) with HIV/AIDS who commenced ART. All ADRs in the first 12 months of therapy were recorded, and the severity, causality, and preventability assessed. The impact of severe ADRs on self-reported adherence, immunological, and body mass index (BMI) outcomes were assessed.

Results

Of the 211 patients included in the analysis, 181 (85.7 %) experienced at least one ADR and 66 (31.3 %) experienced at least one severe ADR within 12 months of commencing ART (incidence rates for any ADR and severe ADR of 14.8 and 3.2 per 100 person-months, respectively). Logistic regression analysis indicated that taking zidovudine-containing regimens (odds ratio [OR] 4.2, 95 % confidence interval [CI] 2.1–8.4) or being unemployed (OR 2.2, 95 % CI 1.1–4.3) were independent predictors of experiencing severe ADRs. Patients who experienced a severe ADR were less likely (OR 0.4, 95 % CI 0.2–0.9) to be ≥90 % adherent to ART. The mean gain in BMI was significantly lower in patients with severe ADRs after 3 and 12 months of therapy.

Conclusions

ADRs were common within the first 3 months in patients initiated on ART. Severe ADRs were negatively associated with self-reported adherence and gain in BMI. Measures need to be implemented to routinely monitor for severe ADRs to improve ART adherence and treatment outcomes.

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Funding

This study was financially supported by the Division of Pharmacy, School of Medicine, University of Tasmania, Hobart, TAS, Australia.

Conflict of interest

Woldesellassie M. Bezabhe, Luke R. Bereznicki, Leanne Chalmers, Peter Gee, Desalew M. Kassie, Mekides A. Bimirew, and Gregory M. Peterson have no conflicts of interest to declare that are directly relevant to the content of this study. Gregory M. Peterson is the principal investigator in the Ethiopian HIV Evaluation (EHIVE) Project.

Acknowledgments

The authors are grateful to Mr. Adane Minayehu, Mr. Zemene Demelash, and Mr. Dawit Demelash who worked as research pharmacists. We are also grateful to the study participants who volunteered for this study, and healthcare providers in the ART clinics who assisted in the recruitment process.

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Correspondence to Woldesellassie M. Bezabhe.

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Bezabhe, W.M., Bereznicki, L.R., Chalmers, L. et al. Adverse Drug Reactions and Clinical Outcomes in Patients Initiated on Antiretroviral Therapy: A Prospective Cohort Study From Ethiopia. Drug Saf 38, 629–639 (2015). https://doi.org/10.1007/s40264-015-0295-7

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