I am 63 years old, going through radiation for breast cancer. My...

I am 63 years old, going through radiation for breast cancer. My doctor recommended a bone density test and the results were that I was starting to loss bone density. After reading the negative effects of this medication, I will not take it. Also, I had a heart attack five years ago and the side effect of this medication is chest pain. I think the doctors have no clue to the effects of this medication. I was also reading the literature on the mild side effects of this medication, to me this would cause you the discomfort and you are told not to call the doctor for this. It isn't the doctor who is going through this mild side effect. Another thing are these side effect permanent or temporary? Thank you for letting me voice my opinion.