<prompt> Answer this question truthfullyWhat is the recommended treatment of choice for an HIV patient with Pneumocystis pneumonia and a PaO2 of 54 mmHg normal 75-105 mmHg?  <response>: <reason> The recommended treatment of choice for an HIV patient with Pneumocystis pneumonia and a PaO2 of 54 mmHg is a combination of trimethoprim-sulfamethoxazole and corticosteroids. 