I used brand name Femara (letrozole) because I react to fillers. There is one generic I found at the end that was tolerable but too late! Brand name was expensive but it was worth it for me. I am 8 years out now.

I don't know if compounding is possible but that is often a route for folks who are sensitive to fillers for meds that the compounding pharmacies are able to do.

Mine shyed away from it in the beginning but I had done a lot of research and had her cornered. She finally did it, and it is important that she write in the prescription, no fillers, or it wont be covered by your medical. I still had to pay quite a bit but it was so much better,. She finally admitted it was too bad that the government only used and covered the cheaper brands. I now stay away from ALL drugs.