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Simultaneous oral therapeutic and intravenous 14C‐microdoses to determine the absolute oral bioavailability of saxagliptin and dapagliflozin
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AimTo determine the absolute oral bioavailability (Fp.o.) of saxagliptin and dapagliflozin using simultaneous intravenous 14C‐microdose/therapeutic oral dosing (i.v.micro + oraltherap).MethodsThe Fp.o. values of saxagliptin and dapagliflozin were determined in healthy subjects (n = 7 and 8, respectively) following the concomitant administration of single i.v. micro doses with unlabelled oraltherap doses. Accelerator mass spectrometry and liquid chromatography‐tandem mass spectrometry were used to quantify the labelled and unlabelled drug, respectively.ResultsThe geometric mean point estimates (90% confidence interval) Fp.o. values for saxagliptin and dapagliflozin were 50% (48, 53%) and 78% (73, 83%), respectively. The i.v.micro had similar pharmacokinetics to oraltherap.ConclusionsSimultaneous i.v.micro + oraltherap dosing is a valuable tool to assess human absolute bioavailability.
Title: Simultaneous oral therapeutic and intravenous 14C‐microdoses to determine the absolute oral bioavailability of saxagliptin and dapagliflozin
Description:
AimTo determine the absolute oral bioavailability (Fp.
o.
) of saxagliptin and dapagliflozin using simultaneous intravenous 14C‐microdose/therapeutic oral dosing (i.
v.
micro + oraltherap).
MethodsThe Fp.
o.
values of saxagliptin and dapagliflozin were determined in healthy subjects (n = 7 and 8, respectively) following the concomitant administration of single i.
v.
micro doses with unlabelled oraltherap doses.
Accelerator mass spectrometry and liquid chromatography‐tandem mass spectrometry were used to quantify the labelled and unlabelled drug, respectively.
ResultsThe geometric mean point estimates (90% confidence interval) Fp.
o.
values for saxagliptin and dapagliflozin were 50% (48, 53%) and 78% (73, 83%), respectively.
The i.
v.
micro had similar pharmacokinetics to oraltherap.
ConclusionsSimultaneous i.
v.
micro + oraltherap dosing is a valuable tool to assess human absolute bioavailability.
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