New obesity drugs are showing promising results in helping some people shed pounds but the injections will remain out of reach for millions of older Americans because Medicare is forbidden to cover such medications.

Drugmakers and a wide-ranging and growing bipartisan coalition of lawmakers are gearing up to push for that to change next year.

As obesity rates rise among older adults, some lawmakers say the United States cannot afford to keep a decades-old law that prohibits Medicare from paying for new weight loss drugs, including Wegovy and Zepbound. But research shows the initial price tag of covering those drugs is so steep it could drain Medicare’s already shaky bank account.