Cigna will cap out-of-pocket costs at $200 per month for patients using the weight-loss drugs Wegovy and Zepbound through an add-on to its pharmacy benefit management plans, the company announced on Wednesday.

Novo Nordisk will sell a less expensive one-month supply of Wegovy for patients who previously took compounded versions of the medication.

Those who take tirzepatide, the drug sold as Zepbound and Mounjaro, could lose more weight than those who take semaglutide, known as Ozempic and Wegovy, according to new research.