Uncomplicated UTI in non-pregnant adult women (no fever or flank pain)

Warning

Either

Back-up antibiotic prescription if symptoms are mild and there are no risk factors for complicated UTI. Advise to start treatment if symptoms do not start to improve within 48 hours or symptoms worsen at any time.

Or

Immediate antibiotic prescription 

Choose antibiotic based on recent urine culture susceptibilities if available, otherwise, treat empirically (see below).

Advise paracetamol or ibuprofen for pain.

Maintain adequate hydration – aim to drink 1.5L of water a day if no contraindications.

Increasing incidence of multi-resistant E coli with extended-spectrum beta-lactamase (ESBL) enzymes, so perform culture in all treatment failures.

Drug details

First Line

Trimethoprim 200mg twice daily for 3 days

Second Line

Nitrofurantoin capsules 50mg four times daily for 3 days

or

Nitrofurantoin m/r capsules 100mg twice daily for 3 days

Please note that modified-release nitrofurantoin capsules are significantly more expensive than immediate-release capsules but may be better tolerated and can be taken twice daily rather than four times daily. Overlabelled packs for nitrofurantoin are only available as modified-release capsules.

Editorial Information

Last reviewed: 26/03/2026

Next review date: 26/03/2029

Author(s): Specialist Antimicrobial Pharmacists.

Version: 1

Author email(s): gram.antibioticpharmacists@nhs.scot.

Approved By: Antimicrobial Management Team

Document Id: AMT_Emp_Primary Care Uncomplicated UTI - Women_1