Novo Nordisk said on Monday it would halt its collaboration with U.S. telehealth company Hims & Hers Health over the distribution of the Danish company's blockbuster Wegovy weight loss drugs. The two companies had announced a collaboration in April for Hims & Hers to sell Wegovy through a bundled offering on the telehealth company's platform.

Novo Nordisk said Hims & Hers has "failed to adhere to the law which prohibits mass sales of compounded drugs" under the "false guise" of personalization.

Patients who took an experimental drug from Eli Lilly & Co. together with Novo Nordisk A/S’s Wegovy maintained muscle while losing weight, offering a potential solution to one of the key problems that’s emerged with popular obesity shots.