Wesfarmers bought out API - which controls all the Price Lines...

Wesfarmers bought out API - which controls all the Price Lines ands services Terry White, some independents, etc. rebranded it as "Wesfarmers Health".
Sigma is still around around as well servicing Amcal and a few others.

Chemist Warehouse was very creative in getting around the strict regulations of pharmacies by having each of their stores classed as an independent franchisee, and by this managed to expand and dominate market share. https://www.copyright link/companies/healthcare-and-fitness/inside-the-chemist-warehouse-franchisee-world-20231212-p5equ1

There is not a lot of money in running pharmacies and with the tough regulations and licensing around it, it would be more headache than its worth when Coles and Woolworths already struggle as it is dealing with internal waste and theft of simple things like cigarettes, imagine if they had to abide by federal laws with regulating S4 to S8 drugs. If you're familiar with the phrase "promoted to incompetency", large companies struggle from this more than others.

Recent Federal Laws promoting consumers to purchase multiple-months were of drugs at a time has also made it more difficult for Pharmacies to maintain their inventory, often not able to have enough supply for everyone, but also struggling with waste from ordering too much for no customers because they already bought 4 months worth of supply.

Coles has pretty much sold off everything it has and is now purely Food and Liquor - with some finance / insurance reselling on top. The only subsidiaries it has is around its supply chain.