Medication Days Supply Calculator

Formula

To calculate the medication days supply:

\[ DS = \frac{Q \times D}{F} \]

Where:

\(\text{DS}\) is the Medication Days Supply (days)
\(Q\) is the Quantity of Medication (units)
\(D\) is the Dosage per Day (units per day)
\(F\) is the Frequency of Administration (times per day)

Medication Days Supply

The Medication Days Supply refers to the estimated duration a prescribed medication will last for a patient based on the dosage instructions provided by the healthcare provider. It is calculated by dividing the total quantity of medication supplied by the number of times the medication is to be taken each day. For example, if a patient is prescribed to take two tablets of a certain medication daily and is given a total of 60 tablets, the medication days supply would be 30 days. This concept is crucial in pharmacy practice as it helps in managing prescription refills, ensuring medication adherence, and avoiding medication shortages or overuse. It also aids in cost management and insurance claims as many insurance companies limit the number of days supply that can be dispensed at one time.

Example Calculation 1

Let's assume the following values:

Quantity of Medication (\(Q\)) = 100 tablets
Dosage per Day (\(D\)) = 2 tablets
Frequency of Administration (\(F\)) = 3 times per day

Using the formula:

\[ DS = \frac{100 \times 2}{3} = \frac{200}{3} \approx 66.67 \text{ days} \]

The medication days supply is approximately 66.67 days.

Example Calculation 2

Let's assume the following values:

Quantity of Medication (\(Q\)) = 50 capsules
Dosage per Day (\(D\)) = 1 capsule
Frequency of Administration (\(F\)) = 2 times per day

Using the formula:

\[ DS = \frac{50 \times 1}{2} = \frac{50}{2} = 25 \text{ days} \]

The medication days supply is 25 days.