Surprisingly, there are a number of drug development companies that do not obtain stable isotope-labeled internal standards (SIL-IS) for their bioanalytical methods. Instead they settle for using a surrogate internal standard (a compound that closely resembles the measured analyte) which can lead to unreliable data and be detrimental to a…

Like the old adage, “you get out of it what you put into it,” good study design is a prerequisite of good data. To boost the chances of generating accurate and informative facts over the course of a study, it is key to consider all of the supporting parameters that…

There is regulatory requirement that the cumulative time a frozen pharmacokinetic sample has been thawed – from the time it’s removed from the freezer to the time it’s returned – be documented. Freeze/thaw cycle data is not deemed sufficient alone, since a study sample might have been thawed for extended…