Shares in Sigma Healthcare fell hard after the chemist wholesale group announced legal action against a pharmacy chain.
A short time ago, the shares were down 27% to $0.862.
The dispute is with the My Chemist/Chemist Warehouse Group over a supply agreement.
Sigma says My Chemist/Chemist Warehouse Group wants to go against the terms of the agreement and source products from another wholesaler.
“As a satisfactory resolution has not been reached, Sigma has now decided to commence legal proceedings,” the company says.
Sigma says the impact on earnings is expected to be between $5 million and $10 million a year.
The company says underlying EBIT (earnings before interest and taxes) this financial year could be up to 5% below last year.