I used to take lot of metrogyl, tini 500, flagyl kind of medicine due to dehydration problem, however after few years I ve started experiencing small black circles on my entire body...After considering those medicine for few more times, those spot gets bigger and itches like anything with a burning sensation...Henceforth I can only consider O2 Tablet & Enteroquinol... Can you plz suggest me few more medicines in that genre (Metronidazole strongly Avoided) which I can consider during my bad times!