similarly , in long term prophylaxis of recurrent urinary tract infection , trimethoprim 100mg daily given as a single dose at night was comparable with nitrofurantoin 50 to 100mg , methenamine 1g , oxolinic acid 375mg or co-trimoxazole ( 80mg trimethoprim/400mg sulphamethoxazole ) each given as a single daily dose .
C0042029
of
C0025638
methenamine