Bioequivalence and Bioavailability Forum • Flashback

Flashback [Regulatives / Guidelines]

posted by jag009 – NJ, 2012-04-05 19:51 (5180 d 04:48 ago) – Posting: # 8388
Views: 12,642

Hi Helmut,

❝ ❝ Should the lab adjust the concentration profile to remove the residual levels caused by the pre-dose concentration???? ie. using the t1/2 and determine the amount of pre-dose concentration remaining throughout the timepoints and subtract it from the respective concentrations.

❝

❝ See above. I cannot imaging that any regulatory agency would accept this (any more).

Question, can the pre-dose (0 hr) concentration be set to 0 if it is less than 5% of Cmax? FDA that is...

Thanks

John

Complete thread:

0 hr Pre-dose concentration but less than 5% of Cmax jag009 2012-03-29 19:34 [Regulatives / Guidelines]
- 0 hr Pre-dose concentration but less than 5% of Cmax Helmut 2012-03-29 19:50
  - 0 hr Pre-dose concentration but less than 5% of Cmax jag009 2012-03-29 20:10
    - Reanalysis if possible Helmut 2012-03-29 23:17
      - Reanalysis if possible jag009 2012-03-30 15:06
        
        >6 sources of matrix Helmut 2012-03-30 15:16
        
        >6 sources of matrix jag009 2012-03-30 20:40
        
        >6 sources of matrix Helmut 2012-03-31 00:23
        
        >6 sources of matrix jag009 2012-04-04 16:32
        
        Flashback Helmut 2012-04-05 16:10
        
        Flashbackjag009 2012-04-05 17:51
        
        No correction if ≤5% Cmax Helmut 2012-04-05 18:08
        
        No correction if ≤5% Cmax navoday 2012-08-15 20:37
        
        excluded period(s) Helmut 2012-08-16 16:36
        
        excluded period(s) rajasekharkakarla 2019-09-20 07:57