Cancerous Lump Removed From Breasts. Advised Arimidex. Unwilling To Have Medication Due To Side Effects. Solution?

My mother is 62 and had a cancerous lump removed from her breast 7 years ago. She also had a hysdirectomy at the same time, due to the fact that her mother also had breast cancer . Last month, she had a tumor removed from her other breast, which the doctors said was stage 2 and that it was not at all related to the tumor that was removed 7 years ago. After testing, the doctors are sure that all cancer has been removed. However, as a precaution, they are suggesting that she takes Arimidex for the next 5 years. My mother suffered such extreme hot flashes, mood changes, depression , and weight gain after her hysdirectomy, that she does not want to take the Arimidex because it has the same side effects. What else can she do? Thank you.