How Can Candidiasis Be Treated?

My sister, who lives very far from me, so I can t tell you a lot about her condition, tells me that she thinks she has Candida. My question is, is there any medications she can take to help rid her body of the yeast? I ve done a lot of research and found lists of food she shouldn t eat and one s she should. Based on my research, she has a very poor diet and eats all the things she shouldn t. She has had a life-time struggle with gut issues. She is get an injection, every 28 days, for her mood disorder. I can t find any information if these things worsen her gut issues.