Exhibit 21.1
List of Subsidiaries
| Entity Name | Domestic Jurisdiction |
| AssuranceRx, LLC | Alabama |
| Atlantic Prescription Services, LLC | Nebraska |
| Bayou State Pharmacy, LLC | Louisiana |
| BriovaRx of Georgia, LLC | Alabama |
| BriovaRx of Hawaii, LLC | Hawaii |
| BriovaRx of Indiana, LLC | Indiana |
| BriovaRx of Louisiana, LLC | Louisiana |
| BriovaRx of Maine, Inc. | Maine |
| BriovaRx of Massachusetts, LLC | Massachusetts |
| BriovaRx of Nevada, LLC | Nevada |
| BriovaRx, LLC | Alabama |
| Catamaran Health Solutions, LLC | Delaware |
| Catamaran Holdings I, LLC | Delaware |
| Catamaran Home Delivery of Florida, Inc. | Delaware |
| Catamaran Home Delivery of Ohio, Inc. | Ohio |
| Catamaran Home Delivery of Texas, Inc. | Texas |
| Catamaran Hospices Services, LLC | Delaware |
| Catamaran Insurance of Delaware, Inc. | Delaware |
| Catamaran Insurance of Ohio, Inc. | Ohio |
| Catamaran IPA II, Inc. | New York |
| Catamaran IPA III, Inc. | New York |
| Catamaran IPA, Inc. | New York |
| Catamaran LLC | Texas |
| Catamaran Mail, LLC | Delaware |
| Catamaran of Pennsylvania, LLC | Delaware |
| Catamaran PBM of Colorado, LLC | Delaware |
| Catamaran PBM of Illinois II, Inc. | Illinois |
| Catamaran PBM of Illinois, Inc. | Delaware |
| Catamaran PBM of Maryland, Inc. | Nevada |
| Catamaran PBM of Massachusetts, Inc. | Delaware |
| Catamaran PBM of Pennsylvania, LLC | Pennsylvania |
| Catamaran PBM of Puerto Rico, LLC | Nevada |
| Catamaran PBM of Texas, Inc. | Delaware |
| Catamaran PD of Maryland, Inc. | Nevada |
| Catamaran PD of Pennsylvania, LLC | Pennsylvania |
| Catamaran PD of Puerto Rico, LLC | Nevada |
| Catamaran Pharmacy of Nevada, Inc. | Nevada |
| Catamaran Rebate Management, Inc. | Nevada |
| Catamaran Rx CHSS, LLC | Delaware |
| Catamaran Senior Services, LLC | Alabama |
| Catamaran TPA, LLC | Delaware |
| Coalition For Advanced Pharmacy Services, LLC | Delaware |
| First Rx Specialty and Mail Services, LLC | Delaware |
| Health Business Systems, Inc. | Pennsylvania |
| inPharmative, Inc. | Nevada |
| IRX Financing I LLC | Delaware |
| PCN DE Corp. | Delaware |
| Pharmaceutical Care Network | California |
| Reformulary Group, Inc.* | Ontario |
| Restat, LLC | Wisconsin |
| Script Relief LLC* | Delaware |
| SXC Comet LLC | Delaware |
* Only a minority interest