I have had severe dandruff for over 4 years. My doctor thought it was fungal, so she had me use Nizoral regularly. It kept my dandruff from becoming even worse, and sometimes my dandruff was mild but not gone. Then I recently contracted pneumonia and was given a round of strong antibiotics. My dandruff disappeared on the 7th day of my antibiotic treatment and has not returned for a couple of weeks now. This makes no sense to me, as I know that dandruff is not bacterial in nature. Do you have an explanation for this?