FEDERAL REQUIREMENTS — Controlled Substances

Schedule I

Controlled-substance schedule with the highest restriction; no currently accepted medical use under federal law.

Schedule II (C-II)

Controlled substances with high abuse potential that have accepted medical uses.

Schedule III (C-III)

Controlled-substance category below Schedule II.

Schedule IV (C-IV)

Controlled-substance category below Schedule III.

Schedule V (C-V)

Controlled substances that may contain limited quantities of narcotics and have low potential for abuse.

Which schedule cannot be refilled?

Schedule II.

Maximum C-II refills

0 refills.

DEA Form 222

Paper form used to order Schedule II controlled substances.

CSOS

Controlled Substances Ordering System; allows electronic controlled-substance ordering without using the paper DEA Form 222.

Controlled substance storage

May be securely locked or dispersed among other medications according to the Walgreens review material.

DEA number

Identifier associated with practitioners authorized to handle controlled substances.

DEA number format

Two letters followed by seven digits.

DEA number verification

Add the 1st, 3rd, and 5th digits; add the 2nd, 4th, and 6th digits and multiply that sum by 2; add both totals. The last digit of the result should match the final DEA digit.

Invalid DEA number

A DEA number that fails the DEA-number validation calculation.