I had great luck with Newman's APNO. I am still not sure if I was dealing with thrush or not though as my symptoms were not typical. However, after weeks of lotrimin and a dose of gentian violet, I was ready to try just about anything. Interestingly, another lactation consultant recommended kellymom.com as a great resource for thrush, but advised against APNO. I am not sure why she advised against it.
If I had similar symptoms again, I would jump through hoops to get a prescription for APNO. While I cannot be sure that it is what got me over the hump last time, I have a strong hunch that the APNO is what finally worked for me. Note: It took a couple of weeks of diligent treatment to feel better.
Just remember..... What works for one might not work for another and what didn't work for someone, just might work for you. Good luck!