I looked up side effects for Prolia and found the following. Some of these are strange to me since Prolia is supposed to help our bones. I have seen these side effects listed in multiple places.

"Severe jaw bone problems (osteonecrosis) may occur. Your doctor should examine your mouth before you start Prolia® and may tell you to see your dentist. It is important for you to practice good mouth care during treatment with Prolia®.
Unusual thigh bone fractures. Some people have developed unusual fractures in their thigh bone. Symptoms of a fracture include new or unusual pain in your hip, groin, or thigh.
Increased risk of broken bones, including broken bones in the spine, after stopping Prolia®. After your treatment with Prolia® is stopped, your risk for breaking bones, including bones in your spine, is increased. Your risk for having more than 1 broken bone in your spine is increased if you have already had a broken bone in your spine. Do not stop taking Prolia® without first talking with your doctor. If your Prolia® treatment is stopped, talk to your doctor about other medicine that you can take.
Serious infections in your skin, lower stomach area (abdomen), bladder, or ear may happen. Inflammation of the inner lining of the heart (endocarditis) due to an infection may also happen more often in people who take Prolia®. You may need to go to the hospital for treatment."

I have taken 3 Prolia shots. No side affects but my spine is getting worse. I’m worried that my next scan will continue to show I’m getting worse. Anyone had this experience?

I have had very good results bone scan reading shows improvements. I have been on prolia for four years. No side effects. Just have to keep dental hygine excellent to prevent extractions.

If you go to Prolia.com, there are references to jaw problems. Look under Side Effects, but also Important Safety Information.

I was on prolia then needed dental work. So I had to stay off for a time because I was told after taking it I wouldn't heal properly then I had to have parathyroid surgery so for the same reason couldn't go back on it until my endocrinologist gave me the ok to go bake on it. Now I am back on it with no problems. Hope this helps .