4. DRUG DISTRIBUTION

DRUG DISTRIBUTION: A TEACHER’S COMPREHENSIVE GUIDE

Welcome, future hospital pharmacists and healthcare professionals!

Drug distribution is defined as “the physical transfer of drugs from the storage area in the hospital to the patients.” It is one of the most critical functions of hospital pharmacy, directly impacting patient safety, treatment outcomes, and operational efficiency. As a pharmacy educator with years of experience teaching hospital pharmacy, I have observed that students often struggle to understand the various drug distribution systems and their practical applications.

In this comprehensive guide, I will walk you through the different drug distribution systems used in hospitals—from traditional methods to modern automated systems. I will share practical insights from both classroom teaching and real-world hospital practice. By the end of this article, you will have a thorough understanding of how drugs are distributed to in-patients, out-patients, and specialized wards, as well as the crucial procedures for handling narcotic and psychotropic substances. Let us begin our journey.

Dpharmguru’s exam insights:

Drug distribution is one of the most frequently tested topics in hospital pharmacy exams. Remember: Hospitals have two types of drug distribution systems—one for in-patients (admitted patients) and one for out-patients (ambulatory patients). Understanding the advantages and disadvantages of each system is essential. Pay special attention to the Unit Dose Drug Distribution System—it is the most modern and preferred method in well-established hospitals!

4.1. DRUG DISTRIBUTION TO IN-PATIENTS

At the present time, very few stock items are prepared on a spontaneous basis in hospitals. However, prepared or procured preparations are sent as floor stock medications, stored in cabinets by the nursing staff, and administered to patients as ordered by the physician. Further responsibilities of storage, maintenance, and records of administration are also fulfilled by the nursing staff. A modern hospital should take feedback from the nursing staff for the medical and pharmacy staff to establish a drug information centre.

Types of Drug Distribution Systems to In-patients:

• Individual Prescription Order Method
• Floor Stock Method
• Combination of Individual Prescription Order and Floor Stock Methods
• Unit Dose Drug Distribution Method

4.1.1. Individual Prescription Order Method

The individual prescription order system, though old, is still followed in small private hospitals. In this system, doctors write a prescription and ask the patient to get the medicines from licensed medical stores. Medications are dispensed in properly labelled individual prescription containers.

Medication labels must include:

• Patient’s name and location
• Drug name and strength
• Drug dose
• Administration route
• Accessory and cautionary statements
• Dispensed date
• Hospital name

Advantages

• Less number of staff is required in the hospital.
• Prescription is directly reviewed by a qualified pharmacist at the medical store.
• Doctors, pharmacists, and patients can interact well.

Disadvantages

• Increased chances for medication errors due to lack of checks in the distribution of medication doses.
• Excessive nursing manpower is required while preparing medication doses.
• Potential for drug loss due to waste, obsolescence, and deterioration increases.

4.1.2. Floor Stock Method

The floor ward stock system is seen in private hospitals. In this system, drugs are stored in the pharmacy stores, supplied to wards when ordered, and supervised by a registered nurse at the nursing station.

There are two types of floor stock drugs:

• Charge Drugs: Costly drugs obtained from the pharmacy store when the pharmacist receives the prescription for patients. Cost of these drugs is billed in the patient’s account.
• Non-charge Drugs: Cheaper and commonly used drugs. Their cost is not directly entered in the patient’s account but included in the per-day cost of the hospital ward.

Dispensing of Non-charge Floor Stock Drugs:

• Drug Basket Method: The nurse checks the medicine closet inventory, tick-marks required drugs on the requisition, and places empty containers in the drug basket. The basket is sent to the pharmacy, where staff fill each container and deliver it back to the floor.
• Mobile Dispensing Unit: A specially designed stainless steel mobile truck is used. The pharmacist running the mobile unit checks drug cabinets and accounts for supplies. A carbon copy of the requisition is left on the pavilion as a delivery record.

Advantages of Floor Stock Method

• Required drugs are delivered easily and quickly.
• Drug returns are eliminated.
• Pharmacy staff members required is reduced.
• Number of drug order transcriptions is reduced.

Disadvantages of Floor Stock Method

• Drug interactions or adverse reactions can occur as the pharmacist does not review the prescription.
• Drug inventory on the pavilions is increased.
• Proper storage facilities in wards are required, increasing costs.
• Greater chances for pilferage.
• Greater load on the nurse.

Dpharmguru’s exam insights:

Floor stock method has a major disadvantage: the pharmacist does not review the prescription before medication administration, which increases the risk of medication errors. This is why many hospitals are moving towards the Unit Dose Drug Distribution System. Remember this distinction—it is frequently tested in exams!

4.1.3. Combination of Individual Prescription Order and Floor Stock Methods

This method of medication distribution is most commonly used. Drugs in this method are mostly dispensed on an individual prescription basis, while the remaining drugs are obtained via limited floor stock. Most frequently used drugs are included in the floor stock drugs—analgesic controlled substances, non-prescription drugs (like paracetamol), pre-operative anaesthetic agents, and those not suited for individual prescription orders.

4.1.4. Unit Dose Drug Distribution Method

Unit dose medications are ordered, packaged, administered, and charged in multiples of single-dose units containing a pre-determined amount of drug sufficient for one regular dose, application, or use. Unit dose dispensing is the pharmacist’s job, but in hospitals it requires the cooperation of nursing, administrative, and medical staff. The hospital pharmacist educates the other staff members involved in unit dose dispensing about this system.

Types of Unit Dose Drug Distribution

• Centralised Unit Dose Dispensing (CUDD): In-patient drugs are dispensed in unit doses; drugs are stored in the main pharmacy and dispensed when the dose is to be given. Drugs are transferred from the pharmacy to the indoor patient by medication cards and dumbwaiters (small cargo elevators).
• Decentralised Unit Dose Dispensing (DUDD)/Satellite Pharmacy: A satellite pharmacy (small pharmacy) is located on each floor of the hospital. The main pharmacy procures, stores, manufactures, packages, and supplies drugs to the satellite pharmacies upon receiving the medication order.

Procedure Followed in DUDD

• Patient is admitted and entered into the system.
• Copy of medication order is sent to the hospital pharmacist.
• Pharmacist enters the medication order on the patient profile card.
• Pharmacist checks for allergies, drug interactions, and rationale of therapy.
• Dosage is scheduled by consulting the nursing station.
• Medication cost is filled for particular schedule delivery.
• Nursing staff administers the medication and makes entry on the medication record.
• Medication card is returned to the pharmacy and re-checked.

Advantages of Unit Dose Drug Distribution

• Patients receive better service and are charged only for doses administered.
• Nurses get more time for patient care as all medication doses are prepared in the pharmacy.
• Pharmacists check a copy of the physician’s original order, minimizing medication errors.
• Paperwork is reduced at the nursing unit and pharmacy.
• Better financial control can be provided.
• Less pilferage occurs.
• Loss of partially used medications is prevented.
• Storage facilities at the nursing station are not required.

Disadvantages of Unit Dose Drug Distribution

• Increased Cost: Requires additional equipment and more expensive medications.
• Time Consuming: Pharmacist takes more time in handling each dose individually.
• Increased Staffing: Time-consuming and labour-intensive.
• Frequent Ordering: Orders are placed more frequently.

Dpharmguru’s exam insights:

The Unit Dose Drug Distribution System is the gold standard in modern hospitals. Remember its advantages: reduced medication errors, more time for nurses to spend on patient care, and better financial control. However, it is more expensive and time-consuming. This is a frequently tested comparison—be prepared to discuss both the advantages and disadvantages!

4.2. DRUG DISTRIBUTION TO OUT-PATIENTS

An out-patient or ambulatory patient is not admitted to the hospital and is given general or emergency treatment which could be diagnostic, therapeutic, or preventive. An out-patient department keeps a check on patients who need not be admitted and require only diagnostic and therapeutic services.

Types of Out-patients

• General Out-patient: Given treatment for a general condition, not an emergency condition.
• Referred Out-patient: Referred by an attending practitioner for specific treatment.
• Emergency Out-patient: Given emergency or accident care for conditions demanding instant medical attention.
• Special Out-patient: Instructed to undergo investigations for precise diagnosis.
• Ambulatory Patients: Patients who can walk and obtain primary care.

Location of Out-patient Department

• A separate out-patient pharmacy is established when the OPD and pharmacy are geographically separate.
• A combined in-patient and out-patient unit with service provided from the same window.
• A combined in-patient and out-patient unit with service provided from separate windows.

Layout of Out-patient Department (OPD)

An important property of OPD is that the waiting period for patients should be minimum. Waiting rooms should have sufficient furniture, reading materials, and informative posters. In case of a rush, more staff members should be available.

Method for Dispensing Medications to Out-patients

• Patient registers at the registration counter and is guided to the appropriate department.
• Patient is diagnosed and given a prescription with name, age, sex, registration number, disease, and medication schedule.
• Patient takes the prescription to the pharmacy.
• Pharmacist dispenses the prescribed drugs without errors.
• Pharmacist provides a token for identification if there is a waiting period.
• Prescription is recorded in the register.
• If the pharmacist has any doubt, they should contact the physician discreetly.
• Compounded drugs are filled in containers and labelled appropriately.
• Pharmacist maintains a register for accounting.
• Prescription is returned to the patient for future visits.
• Schedule G, H, and X drugs are dealt with according to the Drugs and Cosmetics Act.
• Emergency cases are immediately issued medicines.

4.3. DISTRIBUTION OF DRUGS TO ICCU/ICU/NICU/EMERGENCY WARDS

There are specialised hospital units reserved for patients with life-threatening ailments who require close monitoring and extensive treatment.

• ICU (Intensive Care Unit): For critically ill patients requiring intensive care. Common drugs: Adrenaline, Amiodarone, Atropine, Diazepam, Naloxone, Salbutamol.
• ICCU (Intensive Coronary Care Unit): For patients with heart conditions. Common drugs: Antiplatelets (Clopidogrel, Aspirin), Anticoagulants (LMWH), Statins (Atorvastatin), Nitrates.
• NICU (Neonatal Intensive Care Unit): For sick or preterm newborn babies. Common drugs: Ampicillin, Gentamicin, Caffeine citrate, Vancomycin, Beractant, Furosemide, Fentanyl, Dopamine, Midazolam.
• Emergency Ward: For emergency medicine cases. Common drugs: Adrenaline, Noradrenaline, Dopamine, Dobutamine, Calcium gluconate, Atropine, Amiodarone, Lidocaine.

Dpharmguru’s exam insights:

Specialised wards like ICU, ICCU, and NICU require a constant supply of drugs. Remember the common drugs used in each unit—this is frequently tested in exams. Emergency patients have access to a specialised drug distribution system with dedicated cabinets for rapid access to life-saving medications.

4.4. AUTOMATED DRUG DISPENSING SYSTEMS AND DEVICES

Automated dispensing is a pharmacy procedure where a machine fills prescriptions and administers medicines.

Goals for the Use of Automation

• Cost-cutting
• Increasing operational effectiveness
• Increasing sales
• Improving quality and safety
• Managing and integrating data
• Exceptional customer service

Factors that Led to Automation

• Lack of trained technicians and pharmacists
• Decreased operational budgets

Advantages of Automation

• Increased effectiveness (reduces pharmacy staff and workload)
• Increased precision and decreased mistakes
• Upgraded documentation
• Increased security with authorised access only
• Decreased employee turnover and job stress
• Reduced nurses’ and caregivers’ time spent on medications

Disadvantages of Automation

• Extra training and technical support required
• Inflexibility, downtime, and system failure
• Space and budget concerns

Automated Medication Dispensing Devices

• Automated Dispensing Cabinet (ADC): A computerised medication cabinet used in hospitals. Enables tracking and control of drug distribution while storing and dispensing drugs close to the point of treatment.
• Medication Administration Record (MAR): A monthly list of prescriptions for each patient with administration timings. Requires initials and signatures of nursing and facility personnel.
• Computerised Physician Order Entry (CPOE): A clinical information system that lets healthcare professionals enter orders for medications, tests, or treatments directly into the computer.
• Clinical Decision Support Systems (CDSSs): Active knowledge systems that combine patient data, a knowledge base of medical terminology, and an inference engine to produce case-specific recommendations.
• Robotic Dispensing: Large computer-controlled storage containers that can store and fill prescriptions. Can count pills, cap bottles, label prescription vials, and access patient information for accuracy.

4.5. DISTRIBUTION OF NARCOTICS AND PSYCHOTROPIC SUBSTANCES AND STORAGE

Narcotic Drugs and Psychotropic Substances are controlled drugs. A controlled (scheduled) drug is one whose use and distribution is strictly controlled as it has potential for abuse or misuse. In 1985, the Narcotic Drugs and Psychotropic Substances Act (NDPS) was enacted in India to limit the use of these agents for medicinal purposes.

Narcotic Drugs: Include all opioids derivatives such as Morphine, Pethidine, Fentanyl, and Sufentanil—requiring a separate license from the regulatory authority.

Psychotropic Drugs: Include other opioid derivatives like Pentazocin, Tramadol, and Benzodiazepine group (Midazolam, Diazepam, Alprazolam)—not requiring a separate license.

A separate register is maintained for controlled drugs with the following information:

• Full name of the patient
• Address
• Date
• Name and strength of the drug
• Quantity of drug
• Signature of the prescriber
• Dose and route of administration

4.5.1. Hospital Control Procedures

1. Responsibility for Controlled Substances in the Hospital:

• The administrative head of the hospital properly safeguards and handles controlled substances.
• Medical Superintendent or Dean is the administrative head in Indian hospitals.
• The Chief Pharmacist (in USA) or Medical Officer (in India) looks after purchase, storage, accountability, and proper dispensing of bulk controlled substances.
• The Matron or Head Nurse looks after proper storage and use of controlled substances in the nursing unit.

2. Ordering Non-Ward Stock Controlled Drugs from Pharmacy:

• Drugs not stocked on nursing stations are ordered through written prescriptions.
• The prescription should carry: patient’s full name, hospital number, date, drug name and strength, quantity, and physician’s registration number.
• The prescription should be written properly with no cuttings or alterations.

3. Prescribing Controlled Drugs in the Out-patient Department:

• Prescription for narcotic drugs under the NDPS Act and Schedule X should bear: patient’s full name, hospital number, date, drug name and strength, quantity, frequency and route of administration, and physician’s signature.

4. Dispensing Controlled Drugs for Home Use When Pharmacy is Closed:

• A prescription signed by a registered medical practitioner is required.
• In emergency situations, the attending physician calculates the smallest amount required and writes a prescription, and the nurse dispenses the medication from the stock supply.
• The next day, the prescription is presented to the pharmacy for stock replacement.

5. Procedure in Case of Waste, Destruction, Contamination, etc.:

• Aliquot Part Unused: The unused portion should be discarded into the sink and recorded.
• Prepared Dose Refused: The nurse should discard the solution and record the reason, countersigned by the head nurse.
• Accidental Destruction: The responsible person should indicate the loss.
• Control of Narcotics on the Ward: Nursing service assumes responsibility. Auditing of narcotic inventory takes place with each change of nursing shift.

6. Narcotics Delivery to the Ward: Delivered by a reliable individual working in the hospital. Sufficient control records are maintained to detect illegal delivery.

7. Charges for Narcotics to Patients: Depend on the policy of each hospital. Charges are made for each dose received, or a flat charge is made for all narcotics.

4.5.2. Storage of Narcotic and Psychotropic Substances

• Narcotics and psychotropic substances are to be secured at all times under lock and key.
• A different register should be kept for these substances.
• Drugs should be kept in a cabinet with double lock and key.
• The lock’s key should be maintained in the possession of two distinct persons.
• No other objects are allowed to be kept in the drug closet that holds narcotics.
• Narcotic drugs and psychotropic substances should be purchased and stored to prevent them from reaching unauthorised individuals.
• The pharmacist in-charge and the specific nurse in-charge may open and access the storage room.

Dpharmguru’s exam insights:

Storage of narcotic and psychotropic substances is strictly regulated. Remember: Double lock system, separate register, and controlled access are mandatory. The NDPS Act, 1985 is the governing legislation in India. These procedures are frequently tested in exams—especially the requirements for prescriptions and record-keeping!

COMPARISON: DRUG DISTRIBUTION SYSTEMS

FREQUENTLY ASKED QUESTIONS (FAQs)

1. What is the difference between charge drugs and non-charge drugs?

Charge drugs are costly drugs billed directly to the patient’s account. Non-charge drugs are cheaper, commonly used drugs whose cost is included in the per-day cost of the hospital ward.

2. Why is the Unit Dose Drug Distribution System preferred in modern hospitals?

The Unit Dose System reduces medication errors, gives nurses more time for patient care, provides better financial control, and minimizes pilferage. However, it is more expensive and time-consuming.

3. What is the difference between CUDD and DUDD?

CUDD (Centralised Unit Dose Dispensing) stores drugs in the main pharmacy and dispenses them when needed. DUDD (Decentralised Unit Dose Dispensing) uses satellite pharmacies located on each floor of the hospital.

4. What are controlled drugs under the NDPS Act?

Controlled drugs include narcotic drugs (opioids like Morphine, Pethidine, Fentanyl) and psychotropic substances (like Pentazocin, Tramadol, Benzodiazepines). Their use and distribution are strictly regulated by the NDPS Act, 1985.

5. What is the procedure for handling narcotic drugs in nursing units?

Narcotic drugs are stored in a double-lock cabinet with keys kept by two different persons. A separate register is maintained with patient details, drug information, and signatures. Auditing of narcotic inventory takes place with each change of nursing shift.

6. What is an Automated Dispensing Cabinet (ADC)?

An ADC is a computerised medication cabinet used in hospitals. It enables tracking and control of drug distribution while storing and dispensing drugs close to the point of treatment. It helps reduce medication errors and improve efficiency.

SUMMARY

Drug distribution is a fundamental function of hospital pharmacy that directly impacts patient safety and treatment outcomes. Understanding the different distribution systems—Individual Prescription Order, Floor Stock, Combination, and Unit Dose—is essential for every pharmacy professional. While the Unit Dose System is the most modern and preferred method, each system has its own advantages and disadvantages depending on the hospital’s size, resources, and patient population.

The distribution of narcotic and psychotropic substances requires special attention due to their potential for abuse and misuse. Strict adherence to the NDPS Act, proper documentation, and secure storage are non-negotiable requirements. Automated drug dispensing systems are increasingly being adopted to improve efficiency, reduce errors, and enhance patient safety.

As I always tell my students: “Drug distribution is not just about moving medicines from point A to point B—it is about ensuring that the right patient receives the right medication at the right time, through the right route, and in the right dose.”

REFERENCES AND FURTHER READING

• Pharmacy Council of India (PCI). (2022). Hospital Pharmacy Guidelines. New Delhi: PCI.
• World Health Organization (WHO). (2022). Good Pharmacy Practice in Hospital Settings. Retrieved from https://www.who.int.
• Ministry of Health and Family Welfare. (2022). Drugs and Cosmetics Act, 1940 and Rules, 1945. Government of India.
• Narcotic Drugs and Psychotropic Substances Act (NDPS). (1985). Government of India.
• Institute for Safe Medication Practices (ISMP). (2021). Guidelines for Safe Medication Practices. Retrieved from https://www.ismp.org.
• American Society of Health-System Pharmacists (ASHP). (2022). Best Practices for Hospital Pharmacy. Retrieved from https://www.ashp.org.

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult qualified healthcare professionals for medical concerns. Pharmaceutical regulations and guidelines may vary by region—always refer to your local regulatory authorities for specific requirements.

written by:
Dr. N. Sujith Kumar

Dr. N. Sujith Kumar is a pharmacy educator, Pharm.D graduate, and academic content creator from Jawaharlal Nehru Technological University Kakinada (JNTUK), where he completed his Doctor of Pharmacy (Pharm.D) degree between 2015 and 2021. He has more than 7 years of experience creating pharmacy educational content, writing study materials, and reviewing academic articles for pharmacy students. He has also contributed guest articles to pharmacy education platforms, including PharmD Guru. At D.PharmGuru, his work focuses on simplifying complex Diploma in Pharmacy (D.Pharmacy) subjects into easy-to-understand notes, practical explanations, and exam-oriented educational resources for students across India. His areas of focus include Human Anatomy and Physiology, Pharmaceutics, Pharmacology, Pharmaceutical Chemistry, Hospital and Clinical Pharmacy, and other core D.Pharmacy subjects.

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