MOCHA V. 1.0 and V. 2.0 provides the implementation of all order checks demonstrated in the 2006 Pharmacy Enterprise Product Services Proof of Concept (PEPS POC) Demonstration. MOCHA will use services provided by First DataBank (FDB), the current drug database vendor. VistA enhancements include enhanced drug-drug interactions to provide more clinical information to the clinician; enhanced duplicate class to utilize FDB’s Enhanced Therapeutic Classification (ETC) system, which allows for multiple classes per drug; a new maximum single dose order check; a new daily dosage range check; and general dosing information and APIs to support the order check enhancements. HealtheVet (HeV) construction will include component(s) to utilize services provided by a commercial drug database to support Legacy VistA order check changes. The MOCHA application is written in the Massachusetts General Hospital Utility Multi-Programming System (MUMPS) programming language.