Eli Lilly & Co. is suing four telehealth companies selling compounded versions of Lilly's weight-loss drug Zepbound and its diabetes drug Mounjaro.

Eli Lilly Wednesday filed lawsuits against four telehealth companies alleging they are deceiving consumers by selling compounds of slightly-different versions of Lilly drugs.

Pharmaceutical giant Eli Lilly alleges the companies are selling illegal off-brand versions of its best-selling diabetes and weight-loss drugs, Mounjaro and Zepbound.