Single-dose prophylaxis (nitrofurantoin 100 mg, trimethoprim–sulfamethoxazole 800 mg/160 mg, or cephalexin 250 mg) is appropriate for postcoital UTIs. Methenamine hippurate (1 g twice a day), ...

The comparison/control arms were placebo, no treatment, water, methenamine hippurate, antibiotics, or lactobacillus. Eleven studies were not included in the meta-analyses because either the design was ...