Findings from the mixed-effect model analysis showed that having positive with morphine in the urine test (OR=0.24; 95% KTC: 0.06 - 0.90) and HIV viral load ≥ 200 copies / mL (OR=0.07; 95% KTC: 0.02 - 0.28) and receiving ARV treatment after participating in the study (OR=0, 28; 95% KTC: 0, 08 - 0, 96) lead to poor adherence to ARV medication.