HIV-infected patients with active tuberculosis (TB) having CD4 counts < 100/mm3 and who were antiretroviral therapy (ART) naïve were reviewed retrospectively to determine the outcomes of their tuberculosis infection. All patients received ART at or after receiving anti-TB treatment. Clinical manifestations, treatment regimens and outcomes were analyzed. Of 101 patients, 62 (61.4%) completed TB treatment. Of these, 53.2% were treated with a 6-month standard TB regimen, while the rest were treated with prolonged TB regimens. The median interval between anti-TB treatment and ART was 68 days (range: 0-381). Among the clinically cured patients 66.1% received rifampin concomitantly with nevirapine, and 32.3% received rifampin concomitantly with efavirenz. The treatment success rate was 75.6%, with a mortality rate of 6.1%. The risk factors for death were resistant TB (p = 0.03) and poor compliance (p < 0.05). Seven point nine percent had multi-drug resistant TB. Possible or probable immune reconstitution inflammatory syndrome (IRIS) was seen in 15 cases (14.9%). No life-threatening IRIS was reported, and it did not affect disease outcome (p = 0.5). A shorter time between anti-TB treatment and ART onset was associated with the occurrence of IRIS (31 days vs 90 days; p < 0.05). Regarding adverse drug effects, 44.6% had side effects due either to anti-TB drugs or ART. Sixty-six point one percent of them occurred within the first 2 months of TB treatment, and 43 (76.8%) had to stop or change either anti-TB treatment or ART. The mortality rate with TB and HIV on ART was low and the occurrence of IRIS did not carry any additional mortality.