I have taken Boniva, actonel, and fosamax. I had reactions to all of them because they contain the same med. Actonel gave me a rash all over my body.
Then I took Evista which has another med in it. But I had a reaction to that too.
Now I am on a nasal spray (miacalin) and have not had a problem yet. I have been on it for a week.