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newSchoolWorks.com › VoTechWorks › Health & Personal Services › Pharmacy Technician › Pharmacy Law, Safety and Quality › Lesson 5
HLT-PHAR41-05 · Lesson 5 · 15 clock hours · lab

Ordering, receiving, storing and counting controlled substances

Objective. Order Schedule II drugs (DEA Form 222 or CSOS), receive and check them in, keep perpetual counts, take the biennial inventory, and document theft or loss (DEA Form 106) and destruction (DEA Form 41).

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a licensed pharmacist or by a certification or approval body. It is a study draft and may contain errors. Do not use it to make decisions about any patient or medication. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Why Controlled Substance Procedures Matter

Controlled substances carry a high potential for abuse, diversion, and harm. Federal law, enforced by the Drug Enforcement Administration (DEA), imposes strict requirements on every step: ordering, receiving, storing, counting, and disposing of these drugs. As a pharmacy technician, you are often the hands carrying out these procedures. Any error—a missing signature, an unrecorded discrepancy, a miscounted vial—can endanger patients and expose the pharmacy to federal liability. Accuracy and honesty are non-negotiable.

Schedules and Why Schedule II Is Different

The DEA divides controlled substances into five schedules (CI–CV) based on accepted medical use and abuse potential. Schedule II drugs (e.g., oxycodone, morphine, fentanyl, amphetamine salts, methylphenidate) have the highest potential for abuse among drugs with an accepted medical use. This is why ordering them requires a special DEA process separate from routine purchasing.

Ordering Schedule II Controlled Substances

DEA Form 222 is the traditional paper triplicate order form. The pharmacy's DEA registrant (usually the pharmacist-in-charge) must sign each form. Copy 1 and Copy 2 go to the supplier; Copy 3 stays at the pharmacy for at least two years. The form cannot be altered—any error requires a new form.

CSOS (Controlled Substance Ordering System) is the electronic equivalent. It uses a DEA-issued digital certificate to authenticate orders. CSOS eliminates paper but must still be transmitted only by an authorized registrant. Electronic records must be kept for at least two years and be readily retrievable for DEA inspection.

Technicians typically prepare the order and assemble the forms, but only the authorized DEA registrant may sign or transmit the official order. Know your scope: prepare, do not sign.

Receiving Schedule II Drugs

When a Schedule II shipment arrives:

1. A pharmacist (or authorized technician under pharmacist supervision, per state law) must be present.

2. Compare each item against the DEA Form 222 Copy 3 (or the CSOS electronic record): drug name, strength, dosage form, and quantity.

3. Record the date received and quantity on Copy 3 (or in the CSOS record).

4. If a discrepancy exists—short shipment, wrong drug, damaged packaging—do not sign off as complete. Notify the pharmacist immediately; the supplier or DEA may need to be contacted.

5. Move product immediately to the controlled substance vault or safe.

Storage Requirements

Schedule II drugs must be stored in a substantially constructed, locked cabinet or safe (commonly called the vault). Access is limited to authorized personnel. Many pharmacies use dual-key or combination systems. Never leave the vault open unattended. Storing controlled substances outside the vault, even briefly, violates federal and state law.

Perpetual Inventory

A perpetual inventory is a running count updated every time a Schedule II drug is dispensed, received, wasted, or transferred. Each entry should record:

When counting, use a count tray and count twice before recording. If your count does not match the recorded balance, stop and notify the pharmacist. Do not adjust the record without investigation.

Biennial Inventory

Federal law requires a complete physical inventory of all controlled substances at least every two years (biennial inventory). The inventory must include an exact count for Schedule II drugs. It must be signed by the DEA registrant, dated, and kept for at least two years. Many pharmacies conduct this inventory more frequently as a best practice. The biennial inventory serves as an official snapshot that can reveal long-term diversion.

Reporting Theft or Significant Loss: DEA Form 106

If controlled substances are stolen or a significant loss is discovered, the pharmacy must notify the DEA as soon as possible by phone or electronically, then file DEA Form 106 (Report of Theft or Significant Loss). "Significant loss" includes amounts that are beyond normal dispensing variance and suggest diversion. Local law enforcement should also be notified for theft. Keep copies of the Form 106 for at least two years. Document everything: what is missing, when it was discovered, who was involved.

A small, unexplained discrepancy in a perpetual count may not require a Form 106 but must still be investigated and documented. When in doubt, consult the pharmacist-in-charge.

Destruction of Controlled Substances: DEA Form 41

Controlled substances that are expired, damaged, or returned for destruction cannot simply be thrown away. The pharmacy must use a DEA-registered reverse distributor or follow an approved on-site destruction method. DEA Form 41 (Registrant Record of Controlled Substances Destroyed) documents the destruction event: drug name, quantity, method of destruction, date, and the signatures of two witnesses. Retain the completed Form 41 for at least two years.

Safety Reminders

Key terms8

DEA Form 222The official federal paper triplicate order form used by DEA registrants to order Schedule II controlled substances from a supplier.
CSOS (Controlled Substance Ordering System)The DEA's electronic ordering system that uses a digital certificate to authenticate and transmit Schedule II controlled substance orders, replacing paper Form 222.
Perpetual inventoryA continuously updated running record of every transaction—receipt, dispensing, waste, or transfer—for Schedule II controlled substances, with a current balance after each entry.
Biennial inventoryA complete, exact physical count of all controlled substances required by federal law at least once every two years, signed by the DEA registrant.
DEA Form 106The federal form used to report theft or significant loss of controlled substances to the DEA; must be filed as soon as possible after discovery.
DEA Form 41The federal form that documents the destruction of controlled substances, recording drug name, quantity, destruction method, date, and witness signatures.
Schedule IIThe DEA classification for drugs with a high potential for abuse, a currently accepted medical use, and potential for severe psychological or physical dependence (e.g., oxycodone, amphetamine).
DiversionThe illegal redirection of a controlled substance from its lawful medical purpose to personal use or sale; a primary reason strict controlled substance procedures exist.

Worked examples3

1. The perpetual inventory sheet shows a running balance of 48 oxycodone 5 mg tablets before the morning shift begins. During the shift, 3 prescriptions are filled: 30 tablets, 10 tablets, and 5 tablets. What should the perpetual balance read after all three fills?
  1. Start with the recorded balance: 48 tablets.
  2. Add up all tablets dispensed: 30 + 10 + 5 = 45 tablets removed.
  3. Subtract total dispensed from the starting balance: 48 − 45 = 3 tablets remaining.
  4. Record 3 as the new running balance after the final dispense.
Answer: The perpetual inventory balance should read 3 tablets after all three fills.
2. At the end of the shift, the technician does a physical count of the oxycodone 5 mg and finds 5 tablets in the vault, but the perpetual inventory shows a balance of 3. What is the discrepancy, and what is the correct action?
  1. Compare physical count to recorded balance: 5 (physical) − 3 (recorded) = +2 tablet discrepancy.
  2. A positive discrepancy means more stock is present than the record shows, which is still a discrepancy requiring investigation.
  3. Do not change the perpetual record independently.
  4. Notify the pharmacist immediately and document the discrepancy, the time of discovery, and who was notified.
  5. The pharmacist will investigate (e.g., check for a missed entry) before any record correction is made.
Answer: There is a 2-tablet overage discrepancy. The technician must stop, notify the pharmacist, and not alter the record without a supervised investigation.
3. A pharmacy is completing its biennial inventory. The technician counts three partial bottles of hydromorphone 2 mg tablets: 22 tablets, 18 tablets, and 7 tablets. What exact count is recorded on the biennial inventory for hydromorphone 2 mg tablets?
  1. Count each container: 22, 18, and 7 tablets.
  2. Add all counts together: 22 + 18 + 7 = 47 tablets.
  3. For Schedule II drugs, an exact count (not an estimate) must be recorded.
Answer: 47 tablets of hydromorphone 2 mg must be recorded as the exact count on the biennial inventory.
In class: Form 222 / CSOS simulation · Perpetual-inventory count · Loss-reporting scenario
Materials: Mock forms, count trays, training vault
Check: Reconciliation practical: counts match

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Federal Requirements
1. A technician has assembled a Schedule II order and completed DEA Form 222. What is the technician's correct next step?
Federal Requirements
2. Which copy of a paper DEA Form 222 must be retained at the pharmacy for at least two years?
Federal Requirements
3. How often does federal law require a complete physical inventory of all controlled substances?
Federal Requirements
4. A pharmacy technician discovers that the physical count of fentanyl patches is 8 fewer than the perpetual inventory balance. After the pharmacist reviews and confirms the discrepancy, which form must be filed with the DEA?
Federal Requirements
5. A batch of expired morphine sulfate tablets needs to be disposed of by the pharmacy. Which document records the destruction event?
Patient Safety and Quality Assurance
6. A technician is reconciling the perpetual inventory for oxycodone 10 mg. The sheet shows a starting balance of 60 tablets. During the day, 20 and 15 tablets were dispensed. The physical count at end of day shows 24 tablets. What is the discrepancy?
Patient Safety and Quality Assurance
7. Which of the following best describes the purpose of maintaining a perpetual inventory for Schedule II controlled substances?
Federal Requirements
8. When a Schedule II shipment arrives and the quantity received is less than the amount ordered, what is the correct action?
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