Bristol-Myers Squibb Co.’s Reyataz (atazanavir) capsule (300 mg) has been approved by the U.S. Food and Drug Administration for use in combination with ritonavir (100 mg) to treat HIV-1 infection. On the basis of results of the year-long trial which show that atazanavir was as effective as lopinavir along with ritonavir in achieving virologic response  in adult patients who received tenofovir and emtricitabine (300 mg/200 mg once daily) therapy simultaneously.