See also: [[Febrile child]], [[Urinary tract infection|UTI]] See: [RCH - urinary tract infection](https://www.rch.org.au/clinicalguide/guideline_index/Urinary_tract_infection/), [how to collect a urine specimen](https://www.childrens.health.qld.gov.au/fact-sheet-how-to-collect-a-clean-urine-specimen/) > [local antimicrobial guidelines](https://www.rch.org.au/clinicalguide/guideline_index/Local_antimicrobial_guidelines/) **Oral treatment** *Refer to local guidelines* - Cefalexin 20 mg/kg (max 500 mg) oral BD or - Trimethoprim 4 mg/kg (150 mg) oral BD or, - if can't swallow tablets, Trimethoprim/sulfamethoxazole (8/40 mg/mL) 0.5 mL/kg (max 20 mL) oral BD > Gent + ben pen IV if seriously unwell