For continued persistence or recurrence thereafter, the drug moxifloxacin (
Avelox) is sometimes used, to cover the possibility of an infection with
Mycoplasma genitalium, which can be resistant to both doxy and azithromycin.
So if doxy is the only treatment you have had, you should now be treated with azithromycin (1.0 g, single dose) and tinidazole (Tindamax, 2.0 g single dose) (or metronidazole, but it's probably less reliable than tinidazole).