linear kinetics following infusion? [PK / PD]

posted by Helmut Homepage – Vienna, Austria, 2015-04-14 16:38 (4081 d 23:10 ago) – Posting: # 14684
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Hi Alex,

you can assume anything and will know after the experiment. ;-)
Theoretically infusion rates matter. It might be that with a fast infusion rate you saturate the meta­bo­lizing enzyme(s) (high Cmax) and with a slow one (low Cmax) not. You could expect a slower elimination in the former case. However, unless you torture the enzymes in such a way that the elimination switches at high concentrations to zero-order (like C2H5OH) you could still expect ~equal AUCs (=linear PK).
Personally I don’t think you should be too worried about infusions. Such effects are more likely if com­paring very fast releasing oral formulations with MR.

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