I have what i think is a yeast infection. what's safer to take diflucan or zpack. worried about qt interval side effects. i do take atenolol daily. ?

A yeast infection is: commonly in women and refers to a yeast overgrowth in the vagina. If you are referring to a fungal infection in the groin, you would treat that with a topical agent like Lotrimen which would have no bearing on QT issues. Oral agents would not be indicated and ZPack is for bacteria not fungus. You need to see a health care provider for an accurate diagnosis and treatment.