Sentence: Cephalexin , 500 mg 4 times daily , plus trimethoprim-sulfamethoxazole , 320 mg/1600 mg twice daily , for 7 days ( n = 248 participants ) or cephalexin plus placebo for 7 days ( n = 248 participants ) .
Drug combination annotation:
[{'class': 'COMB', 'spans': ['Cephalexin', 'trimethoprim-sulfamethoxazole'], 'is_context_needed': True}]