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Cotrimoxazole Prophylaxis is Not Associated with a Higher Occurrence of Atazanavir Treatment Failure: Analysis of Worldwide Pharmacovigilance Data


Joe Miantezila Basilua* and Philippe Pochart   Pages 1 - 5 ( 5 )


Background: Cotrimoxazole is the main antibiotic used in HIV-infected patients for the prophylaxis of opportunistic infections. This antibiotic is prescribed in patients receiving antiretroviral agents (ART) such as Atazanavir (ATV), a protease inhibitor used with other ART classes. The objective of this study was to compare HIV treatment failure (HIVTF) in HIV-infected patients treated concomitantly with ATV and cotrimoxazole to those of patients treated only with ATV.

Materials and Methods: This is a comparative analysis of the safety data of HIVTF available with ATV in the WHO International Pharmacovigilance database "VigiBase®". We used the SMQ (Standardized MedDRA Querie) to identify all the terms corresponding to HIVTF. We presented results as a percentage or an adjusted Reporting Odds Ratio (aROR) with a 95% confidence interval (95% CI).

Results: A total of 116 cases of HIVTF (2.2%) were reported with ATV among the 5196 individual case safety reports (ICSR) included in the analysis. The proportion of HIV-infected patients who presented ATV treatment failure (ATVTF) was lower (2.6%, 3/116) when cotrimoxazole was concomitant (aROR was 0.5 with a 95%CI from 0.2 to 1.7). Only 10 of 273 ICSRs (3.7%) were reported from Africa concerning the use of cotrimoxazole prophylaxis concomitantly with ATV.

Conclusion: This study did not show a higher occurrence of ATVTF when cotrimoxazole was concomitant. These results reinforce the place of concomitant use of ATV with cotrimoxazole in the management of HIV treatment.


Cotrimoxazole, Atazanavir, Hiv Treatment Failure, Hiv Drug Resistance


Microbial Ecology Laboratory (MIEL), CNAM, Paris, Microbial Ecology Laboratory (MIEL), CNAM, Paris

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