@vickee that is hard to answer. It depends on age and what your preference is. It's like comparing apples and oranges. AI's are considered more effective so some women who are younger, suppress ovaries so they can take an AI.

Side effect lists are on drugs.com. Experiences vary. I was more interested in what was most effective and did an aromatase inhibitor despite already having osteoporosis. People on AI's usually do Reclast or Zometa to protect bones.

If you are post menopausal did your doctor want you on an AI?

It is your choice. But I tried to focus on the positive- stopping cancer- rather than the negative- possible harms. I am not aware of any harms I suffered on an AI other than bone loss. But others have pain. You can always try switching to another AI, switching manufacturers or ultimately switching to tamoxifen if an AI doesn't work for you.