Paresh
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2011-08-05 10:52
(5433 d 21:41 ago)

Posting: # 7261
Views: 6,385
 

 Comparision of dissolution data and actual BABE data [Dissolution / BCS / IVIVC]

Dear all,

Drug having comparable dissolution data as reference drug. Although drug fail to achieve bioequivalence criteria.

Can you provide reason for the same?

Thanks in advance


Edit: Category changed. [Helmut]
Helmut
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Vienna, Austria,
2011-08-05 12:28
(5433 d 20:05 ago)

@ Paresh
Posting: # 7263
Views: 5,182
 

 Similar dissolution # BE

Dear Paresh!

❝ Drug having comparable dissolution data as reference drug.


Don’t mix up ‘drug’ with ‘drug product’ or ‘formulation’. I guess you compared a ‘test product’ with the ‘reference product’.

❝ Although drug fail to achieve bioequivalence criteria.


❝ Can you provide reason for the same?

  • Human guineapigs are nasty beasts. Don’t behave like dissolution vessels.
  • Your dissolution method is not discriminatory enough (Have you checked that at all? Batches with different characteristics tested in pilot studies?).
  • And many more…
Of course everybody tries to match the dissolution of the reference before going into a pivotal in vivo study, but more often than not results are different. What if permeability is the rate-limiting step? Any dissolution test will be unpredictive by definition. If IVIVC would be that easy, all CROs would cut down their business and we would see a lot more successful BCS-based biowaivers.

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Paresh
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2011-08-05 16:15
(5433 d 16:18 ago)

@ Helmut
Posting: # 7268
Views: 5,167
 

 Similar dissolution # BE

Thanks for promt reply.

But in pivotal study reference drug also behave lower side as compare to pilot study.

Dissolution we check the rate of drug dissolve/release from formulation to solution. If drug having limited permeability then both test and reference drug affect not only single one.


Edit: Full quote removed. Please delete anything from the text of the original poster which is not necessary in understanding your answer; see also this post! Added last paragraph from another post. Don’t start a new post if you want to add something; edit your original post instead. [Helmut]
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