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Controlled Substance Ordering System
For Purchasers For Suppliers For Developers

DEA's Controlled Substance Ordering System (CSOS) allows suppliers to fill secure orders of electronic Schedule I-V controlled substances without the supporting paper Form 222.

Information for wholesalers, suppliers, distributors, and manufacturers:
bulleted item Learn about CSOS
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bulleted item Enroll in CSOS to purchase CII's
bulleted item Support your customers
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 Certificate Support Guide - The Certificate Support Guide is intended to assist wholesalers in supporting their customers with the management of CSOS certificates. Click here to get the latest version.

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Latest News

Please be aware of a process change that will be implemented effective Tuesday, July 8th, 2008 for downloading new user certificates. Complete instructions will be available on the certificate retrieval website following this change.