Eli Lilly & Co. is suing four telehealth companies selling compounded versions of tirzepatide, the active ingredient in Lilly's weight-loss drug Zepbound and diabetes drug Mounjaro. Lilly claims Mochi Health,

The drug company Eli Lilly is suing four telehealth companies for allegedly selling copies made by compounding pharmacies of its drug Zepbound.

Eli Lilly (NYSE: LLY) has been growing its sales at a good clip over the past year. This is partly thanks to Zepbound, a weight loss medicine that's already generating more than $1 billion in quarterly sales,