Got prescribed cipro (ciprofloxacin) (500mg 2x day, 7 days) for chancroid (have 7 ulcers on penis). after 6 days, they still there but turned white. is it curing?

Maybe herpes?: If the lesions are less painful and any enlarged lymph nodes in the groin are becoming nontender and smaller, most likely the cipro (ciprofloxacin) is working and healing will continue. However, I'm worried you might have herpes instead. Herpes often causes several sores, but chancroid almost always has just one or two. Recheck with your doctor, or maybe a sexual health or STI expert. Good luck!