USP <711> Dissolution Stage Testing Explained (+ Excel Calculator for Stage 1, 2, and 3 Testing)
Dissolution testing plays a vital role in the pharmaceutical industry, serving as a critical step in the development and quality control of dosage forms. This testing enables the evaluation of both the rate and extent of drug release from a formulated product.
To comply with dissolution requirements, the quantity of active ingredient dissolved from the tested dosage units must align with the specifications provided in USP <711>. It is imperative to conduct testing across all three stages unless the results conform at either S1 or S2.
Reference: USP <711> Dissolution
To streamline calculations for stage testing, we have developed a template that determines whether your data meets the USP <711> dissolution guidance. By entering the dissolution data and the corresponding Q values, the template will indicate whether each stage has passed or failed. This tool simplifies the process and ensures adherence to regulatory standards.
Stage 1
Input the dissolution time points in the "Time" column and the corresponding % dissolved values for each of the six individual dissolution vessels in columns labeled 1 through 6. In the "Q" column, enter the targeted amount of active substance, expressed as a percentage of the label claim, that should dissolve within a specified time. The template will automatically calculate Q+5% and display the result in the "Result" column, indicating whether the data passes or fails.
Stage 2
In the event that the generated data fails Stage 1, an additional six replicates must be performed. Record the new dissolution data in columns 7 through 12. The template will automatically copy the data from Stage 1 in columns 1 through 6. The template will also calculate Q-15% and the average. Furthermore, it will indicate whether the data has passed or failed the Stage 2 testing, as per USP <711>.
Stage 3
If the data continues to fail Stage 2 testing, additional 12 replicates must be performed. The template will automatically transfer data from both Stage 1 and Stage 2 testing to the new table. Enter the new dissolution data in columns 13 through 24. The template will calculate Q-15%, Q-25%, and the average. The template will indicate whether the data passed or failed Stage 3 testing according to the USP <711>.
Feeling overwhelmed? Simplify the process with our dissolution stage testing template. Quickly perform these calculations and make your life easier!
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Frequently Asked Questions
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“Q” represents the percentage of the labeled active ingredient that must dissolve within a specified time period according to regulatory specifications.
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USP <711> dissolution testing generally includes three stages:
Stage 1 (S1)
Stage 2 (S2)
Stage 3 (S3)
Testing may stop early if acceptance criteria are met at S1 or S2.
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In Stage 1:
Six dosage units are tested.
Each unit must meet the required dissolution criteria, typically Q + 5%.
If all six units pass, testing ends successfully.
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If Stage 1 fails:
An additional six dosage units are tested in Stage 2.
The combined average and individual results are evaluated against USP <711> acceptance criteria.
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For Stage 2:
A total of 12 units are evaluated.
The average of all units must be equal to or greater than Q.
No individual unit should fall below Q − 15%.
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If Stage 2 still fails:
Twelve more units are tested, resulting in 24 total units.
Additional limits such as Q − 25% are evaluated alongside the overall average.
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Testing may stop:
After Stage 1 if all criteria are met.
After Stage 2 if Stage 2 criteria are satisfied.
Stage 3 is only required if Stage 2 fails.
