The FDA said on Friday it plans to restrict GLP-1 ingredients used in non-approved compounded drugs from companies like Hims & Hers.

Novo Nordisk and Eli Lilly fell after Hims & Hers said it will offer a copy of the Wegovy pill for $49, far less than the $149 Novo sells the branded pill for.

Hims & Hers stock fall to a 12-month low after Novo said it's $49 Wegovy pill copy was "illegal"

The FDA said on Friday it plans to restrict GLP-1 ingredients used in non-approved compounded drugs from companies like Hims & Hers.

Hims & Hers on Saturday announced it would stop offering its copycat of the weight-loss pill Wegovy after threats of legal action.

The announcement comes a day after the US Food and Drug Administration said it was cracking down on copycat weight-loss treatments.

Novo Nordisk shares jumped 8% Monday after Hims & Hers said it will pull its copycat weight-loss pill off the market.

Novo is asking the court to permanently ban Hims from selling compounded versions of its drugs that infringe patents, and is seeking to recover damages.

Shares in US company fall 16% after FDA announces investigation into unregulated medication