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Abstract

Tuberculosis (TB) is the most common opportunistic infection amongst persons living with HIV (Human Immunodeficiency Virus) (PLWHIV). World Health Organisation recommends tuberculosis preventive therapy (TPT) to avert the effects of TB/HIV co-infection. This study aimed at determining the incidence of active tuberculosis infection, assessing the burden of adverse drug events (ADEs) and identifying the associated factors. In this study, records of 379 patients who started isoniazid preventive therapy at Mbarara Regional Referral Hospital (MRRH) between 1st July, 2017 and 30th June, 2022 were retrospectively reviewed. Data was analyzed using a statistical software (SPSS version 20.0) and presented using descriptive statistics. Logistic regression was performed to explore the factors associated with adverse drug reactions during the course of isoniazid preventive therapy. The prevalence of ADEs was 20.3%. Fifty-five (71.4%) experienced at least one adverse drug event during the course of isoniazid preventive therapy while 22 (28.6%) had at least two. Elevated serum transaminases (23.7%), peripheral neuropathy (20.4%), skin rash/pruritis (15.1%) and musculoskeletal symptoms (10.8%) were the most frequently documented adverse drug events. Patients on at least two other drugs alongside their isoniazid preventive therapy (AOR = 2.23 (1.25,3.97 at 95% CI); p value = 0.006) and those not prescribed prophylactic pyridoxine (AOR = 3.21 (1.34,7.60 at 95% CI); p value = 0.008) were significantly likely to experience adverse drug events. Only one patient (0.28%) developed tuberculosis disease making the incidence of tuberculosis disease 0.1 per 100-person years. The study findings revealed that the prevalence of ADEs among PLWHIV who are on isoniazid preventive therapy was very low. Elevated serum transaminases, peripheral neuropathy, skin rash/pruritis and musculoskeletal symptoms were the most commonly reported adverse drug events. The incidence of ADEs can be reduced by providing pyridoxine prophylaxis therapy and limiting the number of concomitantly used medications.

Digital Object Identifier (DOI)

10.70176/3007-973X.1017

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