A comparative evaluation of the effects of ZLN and TLE anti-retroviral regimens in HIV positive patients: A retrospective record-based study

Abstract

Objectives: Until 2012, zidovudine+lamivudine+nevirapine (ZLN) was the first line treatment for human immunodeficiency virus (HIV)-positive patients, whereas in 2013, tenofovir+lamivudine+efavirenz (TLE) was recommended as a preferred regimen due to less adverse drug reactions and better virological response. The present study was done to compare the change in CD4 count and emergence of opportunistic infections (OIs) in HIV-positive patients on ZLN and TLE regimens. Materials and Methods: This retrospective record-based study was conducted at anti-retroviral therapy (ART) center of a tertiary care hospital on 150 charts of patients on ZLN (Group A) and TLE (Group B) regimens each for 1 year. Data were analyzed using GraphPad Prism version 6. Results: The mean age of patients in Group A was 38.72 (±10.5) years and Group B 37.75 (±11.57) years (P = 0.4460). After 1 year of ART, the mean CD4 count (cells/mm3) increased in both groups (Group A: 223.51 [±111.21] to 415.37 [±218.16] [P = 0.0001] vs. Group B: 255.05 [±164.50] to 433.12 [±247.66] [P = 0.0001]). With the baseline counts being comparable (P = 0.0527), the difference in mean CD4 counts between the groups post-ART was not statistically significant (P = 0.5105). The incidence of OI was 45% in Group A as compared to 25% in Group B. Overall, the most prevalent OI was tuberculosis (TB) (13.33%). Conclusion: Both ZLN and TLE regimens are equally effective in improving the immunological status of HIV-positive patients. Patients on ZLN have higher incidence of OI than those on TLE. However, therapy should be individualized as per patient’s suitability.