I am taking fluconazole and felt like fainting when at work yesterday. Should I be worried?

Fluconazole effects. It depends on what else you are taking, and the reason for which you are taking the drug. See this link for more information: http://www.Nlm.Nih.Gov/medlineplus/druginfo/meds/a690002.Html i suggest you discuss with the doctor who prescribed it for you.