Eli Lilly said on Wednesday it had sued four compounders for selling unapproved products containing tirzepatide, after a U.S. judge last month blocked pharmacies from making copies of its weight-loss and diabetes medicines.

Pharmaceutical giant Eli Lilly (LLY) surged 14% last week to $840 per share following positive Phase 3 trial results for its oral weight-loss drug, orforglipron. With a market cap of $796 billion, LLY is the world’s most valuable healthcare company, and its trajectory suggests it could reach $1,000 per share or more by year-end 2025.

Shares fell after Eli Lilly announced results of a new pill that could rival the weight-loss potential of the Danish giant’s blockbuster shots.