Dissolution test is done to verify the release of drug in the solution from the tablet because of binders, granulation, mixing and the coating may affect the release of drug from tablets.
These dosages forms are run for the specified time period, sampled and analyzed for the dissolved amount of active ingredient in percentage. This is the first stage of the dissolution and known as S1 Stage.
In S1 stage dissolved amount of each unit should not be less than Q+5%. It shows that every unit should be above 5% of the specified limit in the individual monograph. If any of the units is found below this limit then we have to analyze the sample in the S2 stage.
Related: Dissolution Test and Apparatus
Six additional units are also tested for the dissolved content. Now the average of all 12 units should not be less than Q and no unit should be less than Q-15%. It gives some flexibility to the test results. Average should be equal to or more than Q but some units may below the Q. If any unit is found below the Q-15 or average of all units is less than Q then the sample is analyzed in the S3 stage.
Dissolution stages give the flexibility to the sample that is unable to pass the dissolution test. These stages are accepted by all regulatory bodies. Hence, it is a widely accepted test method for the dissolution of solid dosage forms.
Also see: Calibration of Dissolution Testing Apparatus
These dosages forms are run for the specified time period, sampled and analyzed for the dissolved amount of active ingredient in percentage. This is the first stage of the dissolution and known as S1 Stage.
In S1 stage dissolved amount of each unit should not be less than Q+5%. It shows that every unit should be above 5% of the specified limit in the individual monograph. If any of the units is found below this limit then we have to analyze the sample in the S2 stage.
Related: Dissolution Test and Apparatus
Six additional units are also tested for the dissolved content. Now the average of all 12 units should not be less than Q and no unit should be less than Q-15%. It gives some flexibility to the test results. Average should be equal to or more than Q but some units may below the Q. If any unit is found below the Q-15 or average of all units is less than Q then the sample is analyzed in the S3 stage.
Dissolution stages give the flexibility to the sample that is unable to pass the dissolution test. These stages are accepted by all regulatory bodies. Hence, it is a widely accepted test method for the dissolution of solid dosage forms.
Also see: Calibration of Dissolution Testing Apparatus
Excellent Post!
ReplyDeleteVery informative...
ReplyDeleteDear Sir,
ReplyDeleteThese articles were very informative.
I am very much thankful to you.
Regards
Mohan
Nicely explained.. dissolution criteria thanks sir..
ReplyDeletepls...give information for sustain release....
ReplyDeleteThanks for providing useful information. Helpful for learners. Keep posting of similar posts.
ReplyDeleteWhy should we use only 2mm or #10 mesh in dissolution basket...?? is there any guideline??
ReplyDeleteYes, it is given in pharmacopoeia.
DeleteWhy we use only 6 apertures in baskets or 6 dosage units in dissolution tests...?? Why can't we take more than 6 if we take it's better to provide the reproducibility of the system...Does it make sense??
ReplyDeletePharmacopoeia says to take 6 tablets for dissolution.
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ReplyDeleteHow to calculate Q ? It's depend on formulation & different products. Any example & calculation.
ReplyDeletegood and very informative but this guideline applicable in product development stage?
ReplyDeletegood and very informative but this guideline applicable in product development stage?
ReplyDeleteThis guideline is applicable in product development stage?
ReplyDeleteIf 6 tablets in S1 stage shows Q less than 25% the. Is it necessarg to carry the test to S3 or not ?
ReplyDeleteThanks Ankur sir, For shared this .
ReplyDeleteDear Mr.saidi
6 tablet is using in dissolution because we can consider the data is accurate and precise.
In S1 stage dissolution amount of each unit should not be less than Q+5% it shows that every unit should be above 5%.
ReplyDeleteWhy it is 5% ?
Please suggest