Tioconazole
"I used this for a yeast infection and it really works. Before using this, I did a vaginal ph test to make sure I didn't have BV or some other sort of infection. Once I saw that my ph levels were fine, I proceeded with the monistat and used as directed. Yes, it itches like hell for a short while. And yes it does leak. I usually do it before bed and wear a panty liner. I try to do it when I'm really sleepy or have taken a drowsy medication, to avoid being awake through the itchy phase. 
I see the comments that people have received chemical burns or other painful issues with this product. It may be that their ph levels are off and it isn't a YI that they have in the first place. I'd advise you to use a vaginal ph first and go from there."