A move to offer costly weight-loss drugs for obese Americans on Medicare and Medicaid may be in the works, but such a program may run into problems with voluntary participation and expense concerns.

Drugs known as GLP-1 receptor agonists were initially developed to treat Type 2 diabetes but have become a cultural phenomenon.

When the reception hosts proclaim, "the buffet is open!"There follows the rush to all those tasty treats and dishes laid out. You pile mounds of food onto your plate, and yet more, until your trouser ...