Dosage info for Cipro for UTI

Patient: I had been prescribed nitrofur mono 100 mg 2x a day for 7 days for a UTI Seemed to help but came back a week later. This was at City MD in nyc. since my GP was not in the office. Now I went to my GP and he put me on cyprofloxacin HCL 500 MG 2 x a day for 7 days or stop after 5 days if I feel better. Since my Dr is not available on wknds and I feel that this dosge is high, I wonder if it would be hurtful to just take one pill a day.

Symptoms: UTI