| Business | Phone |
| Omnicare Medical Supply Svc 1717 Park St, Naperville 60563 | (630) 305-8000 |
| Baxter Pharmaceutical Chicago 40 Shuman Blvd, Naperville 60563 | (630) 428-1200 |
| Bershire Corp 744 Thornapple Dr, Naperville 60540 | (630) 579-1355 |
| Centocor Inc 184 Shuman Blvd 400, Naperville 60563 | (630) 300-7002 |