I was diagnosed 4 months ago with a tumor in my spine. Only one tumor present. Had radiation and now going to start zometa. I had dental work done that is why I delayed treatment for 3 months. Is that ok? Does it matter if you start later rather than soon? I am also concerned about side effects. I had problems with fosamax in the past and boniva. I was ok on the actenol. Is there a a better alternative?