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Independence Day
Cencora will be closed in observance of the Independence Day holiday and there will be no deliveries on Thursday, July 4. Our Customer Service and Customer Systems Support teams will also be unavailable on this day. Please review our full holiday schedule for more detailed information and to plan your orders accordingly. We will resume normal operations on Friday, July 5.

Controlled substances

Oral pharmaceutical product

Ordering controlled substances in the United States

The Controlled Substances Act (1970) created five classifications commonly referred to as “Schedules” for certain pharmaceuticals manufactured or used in the United States. Drugs are scheduled according to their medical use and their potential for abuse. Their sale and distribution are closely controlled. Customers who wish to purchase controlled substances from Oncology Supply first need to request authorization.

Eligible customers can place DEA schedule II (C2) controlled substances orders electronically using their Controlled Substance Ordering System (CSOS) certificate on ABC Order.

This innovative technology solution provides a paperless, efficient and secure way to order C2 controlled substances, thus expediting the delivery of controlled substances, saving time and money, and minimizing paperwork and paper storage expenses. The ordering process for C3-5 items is the same as the process for regular Rx and OTC items through ABC Order.

  • If you currently have a CSOS Certificate from the DEA and would like to order C2 controlled substances from Oncology Supply, please refer to the CSOS Signing Profile quick reference card [PDF] for assistance.


DEA business activity
590 questionnaire to complete
Retail pharmacy
Practitioner (including MLPs)   

Get in touch

Need help with your forms? Want to better understand what’s required of your practice? Reach out and we’ll start a conversation to guide you through the process.

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