Management of Drugs at Health Centre Level - Training Manual
(2004; 84 pages) View the PDF document
Table of Contents
View the documentForeword
View the documentAcknowledgements
View the documentObjectives
View the document1. Introduction
Open this folder and view contents2. Management of drugs
Open this folder and view contents3. Selection of drugs
Close this folder4. Drug procurement
View the document4.1 Estimation of drug requirements
View the document4.2 Determining drug types and quantities required
View the document4.3 Delivery (lead) time
View the document4.4 Monthly consumption
View the document4.5 Request indicator (re-order)
View the document4.6 Quantity to be requested
View the document4.7 Price of drugs
Open this folder and view contents4.8 Requisition, supply and receipt of drugs
Open this folder and view contents4.9 Supply of drugs from medical stores
Open this folder and view contents4.10 Drug storage
Open this folder and view contents5. Drug distribution
Open this folder and view contents6. Use of drugs
Open this folder and view contents7. Drug stock management support tools
View the document8. Definitions
View the document9. References
Open this folder and view contents10. Annexes
View the documentBack cover
 

4.4 Monthly consumption

Monthly consumption may be collated with data obtained from:

• Bin (stock) cards,
• Daily use record, daily cash record,
• Drug register.


Normally, monthly consumption is obtained by:

• Calculating the average consumption over a period of time (e.g. six months)
• Or dividing the total consumption over the period by the number of months the drug dosage form was consumed.


Example 1: Monthly consumption

The first method of calculating monthly consumption is to add the quantity of drugs in stock at the beginning of a period (e.g., six months) to the quantity of drugs received during that same period and then subtract the quantity of drugs remaining at the end of the period.

April 2000, quantity of paracetamol 1,000 × 500-mg tablet containers in stock = 14
June 2000, quantity of paracetamol 1,000 × 500-mg tablet containers received = 8
September 2000, quantity of paracetamol 1,000 × 500-mg tablet containers, remaining stock = 6
Therefore, total quantity of paracetamol 1,000 × 500-mg tablet containers consumed over a six-month period = 14 + 8 - 6 = 16.

Average monthly consumption = 16/6

Average monthly consumption to the nearest container = 2 2/3

Example 2: Monthly consumption

A second method of calculating the average monthly consumption is to obtain data on consumption from the bin card on a monthly basis and then find an average over a period of time.

April 2000

2 × 1,000 tablets

May 2000

4 × 1,000 tablets

June 2000

2 × 1,000 tablets

July 2000

2 × 1,000 tablets

August 2000

3 × 1,000 tablets

September 2000

3 × 1,000 tablets

 

16 × 1,000 tablets

Average monthly consumption is

Average monthly consumption of container to the nearest container = 3

Example 3: Monthly consumption

A third method of calculating average monthly consumption is to obtain data on actual consumption from the daily use record or daily use/cash record.

Data of monthly consumption of paracetamol 500-mg tablets over a six-month period.

April 2000

2,000 tablets

May 2000

3,100 tablets

June 2000

2,300 tablets

July 2000

2,100 tablets

August 2000

3,100 tablets

September 2000

3,200 tablets

   

Total six months

15,800 tablets

Average monthly consumption of tablet is

15,800/6 = 2633.3 tablets

Each container has 1,000 tablets. Therefore the average monthly consumption of 1,000-tablet tin = 2633.3/1000 = 2.6 tins

Average monthly consumption of paracetamol 500-mg tablets to the nearest container = 3

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