1500/mo copay?!
Unbelievable.

I am on Evenity and seem to have no side effects. I have traditional Medicare and it is covered 100% under Part B because I have the injections at an infusion center.
Other non-traditional Medicare plans like Medicare Advantage plans are different. They seem to all have different rules about these drugs.
Open enrollment starts October 15 and you can change Part D plans then if you want.
I have never changed my plan because the Part D plan that I have is fine. Also, the Evenity is covered by Part B. Every year, however, I call Medicare - 1-800-med-icar- and review my husband’s Part D plan. He is on a lot of expensive drugs and the formulary changes year to year. This is a project, but important.
I call Medicare during open enrollment and the well trained, helpful person on the phone already knows what drugs he’s on, where he’s getting them, how much they cost, etc. They will then look at other plans with me and we figure out what is best for the coming year. If he changes plans, the Medicare rep on the phone can do that right then.
I have been doing this for 20 years for seniors on Medicare. Now I’m a senior and vigilant about this.
Just remember that the Part D plans are all private entities, therefore, they have a profit motive. Medicare is not for profit and doesn’t care what plan you choose. So, you will get unbiased information from them.

Check with your endocrinologist
's billing people. They may be able to tell you which plan covers the most

I live in Kansas & we have Senior Center's here. Beginning in October they
take appts to help you decide what drug plan is best & least expensive for you.
their is no charge as all are volunteers.
They also help folk with their tax prep= no charge= volunteers.

Look for Senior Centers in your area.
We lived in Orange Co. ( the 60's) & then north in Tarzana in the 70's.
Loved going to Disneyland when it wasn't so expensive & Knott's Berry Farm when it was FREE. In Tarzana my son saw peacocks on his walk to school.