Trimethoprim-sulfamethoxazole.
D000368:Aged; D004761:Enterocolitis, Pseudomembranous / Q000139:chemically induced*; D006801:Humans; D013420:Sulfamethoxazole / Q000009:adverse effects*; D014295:Trimethoprim / Q000009:adverse effects*
D014295:Trimethoprim; D013420:Sulfamethoxazole