I am on prolia. Forteo and prolia are two different kinds of medications. My doctor wanted me to take Forteo because it builds bone and builds it rapidly rather than just slowing down the process of bone breakdown. I opted for Prolia which is an injection two times a year. Forteo needs to be injected daily and because I have so much cancer in my family I did not like the black box warning about bone cancer. After one year on Prolia, (as of May 2019) there has been significant improvement in both my spine and hip and my doctor seemed pleased with the results. So, I went ahead with injection #3. I also take 2000i.u. of video daily.
Google both medications to learn more about them.