Are there side effects with medications used to treat osteoporosis if they are injected instead of taken orally? Do you avoid stomach upset, etc.?

Injectables are. less difficult on the stomach, and they also do not depend on gut absorption. so for many women the injectable bisphosphonate drugs like pamidronate for osteoporosis (amongst other things) are useful. the downside is that injectable drugs can seriously lover your blood calcium levels. The doc prescribing the medication knows this and you should have that monitored.