Cue, I haven't had any negative effect with Forteo.
While some do have side effect, the thing to remember is that you can stop the medication. Forteo is one that clears the bloodstream quickly. If you happen to be allergic to one of the excipients, stop the the injections and give Tymlos a try. Some can't tolerate Forteo, but do well on Tymlos. It is another medication that is cleared rather quickly from the bloodstream. So, you are only risking misery for a day.
There is validity to the argument that your body may adjust to these medications. But I don't think we should power through.
Another valuable thing about these two medication is that if you can't tolerate either, it's a signal to look carefully at your parathyroid glands and your kidney function. Usually if the function of either is compromised, once remedied the anabolic can be continued.
I hope Forteo works well for you and that you join me.