I READ ON ONE OF THE POST ABOUT PERSISTENCE URETHRITIS, THAT ONE OF DOCTOR'.S STATED THAT ONE TREATMENT REGINMENT INCLUDE USING OF( FLAGYL 1GM) PLUS ERYTHROMYCIN ON OTHER'S WEBSITES I READ IT STATED, THE USE OF FLAGYL 2GM ONE SINGLE DOSE: ALSO I READ ON DIFFERENT POST THAT DOXYCYCLINE IS STANDARD TREATMENT FOR CHLAMYDIA WHICH SOMETIME CAN FAIL, MY QUESTION IS IF TRICH ISN'T ONE OF REASON FOR THIS FAILURE THEIRFORE LEAVING FLAGYL OUT OF THE PICTURE, COULD THE FAIL RATE BE DUE TO DURATION OF TREATMENT USING DOXY, FROM (100MGX2) 7 DAYS MAYBE UP TO 14 DAYS OR LONGER TREATMENT CYCLE ,THE REASON I ASKING BECAUSE SOME PEOPLE DON'T LIKE USE OF SO MANY DIFFERENT ANTBOTICS , SORRY, TO BE SO LONG WINDED : FLAGYL /DOXY. WHATS THE REAL STORY???????