I too started Fosamax this first quarter and have experienced gastrointestinal side effects, heartburn, upset stomach and general overall malaise. So, I only took it for about six weeks. My doctor then switched me to ProLia by injection every six months. I filled the script and put the Prolia in the refrigerator as instructed. I then did some more research and read the extensive list of side effects reported by other users.It was then that I spoke with my sister, a natural medicine Shamen. She recommended trying a combination of vitamin d3 5000 iu, Juvenente, Strontium caps 750 mg,, and Bone Up brand calcium compound 5000 mg until my next DEXA Scan in September. So, that's what I doing now.If I don't have a significant improvement by then, I will reconsider the Prolia solution, ProLia keeps in the refrigerator for about two years so it will still be usable until the Fall. It's about a 65 dollar copay on my insurance, but at twice a year its not too bad. I hope it proves effective as the list side effect is daunting.
Good luck with whatever path you choose,