Cardinal Health, based in Ohio, is one of the three large US pharmaceutical distributors, along with McKesson and Cencora. It does not invent drugs or treat patients. It runs the regulated supply chain that moves medicines and medical devices from manufacturers to pharmacies and hospitals, so a prescription collected at a local pharmacy has often passed through its network. The company is headquartered in Dublin, Ohio.
The business model is large, high-volume logistics divided into two segments: Pharmaceutical and Medical. In the Pharma segment, they buy billions of dollars of drugs from manufacturers (like Pfizer) and distribute them daily to tens of thousands of pharmacies and hospitals, taking a tiny markup. In the Medical segment, they actually manufacture and distribute low-cost, high-volume medical supplies (like surgical gloves, gowns, and syringes), acting as the large central supply closet for the entire American hospital system.