T. Schettler et al., Comparative pharmacokinetics of two fast-dissolving oral ibuprofen formulations and a regular-release ibuprofen tablet in healthy volunteers, CLIN DRUG I, 21(1), 2001, pp. 73-78
Objective: Spalt-Liqua(R) is a new soft gelatin capsule containing 200mg of
totally dissolved ibuprofen as the active ingredient. The primary objectiv
e of the study was to assess bioequivalence between the new ibuprofen formu
lation and the standard 200mg sugar-coated tablets. The secondary objective
was to assess bioequivalence between the new formulation and 200mg tablets
of a fast-dissolving ibuprofen lysinate formulation.
Design and Study Participants: A single oral dose of ibuprofen 400mg (two o
f each type of capsule or tablet) was administered to 26 healthy male volun
teers in a nonblind, randomised, three-way crossover study with a 6-day was
hout interval between each drug administration period.
Main Outcome Measures and Results: For the soft gelatin capsules, maximum c
oncentration (C-max) was significantly greater and time to reach maximum co
ncentration (t(max)) was significantly shorter in comparison with the refer
ence tablet formulation, and therefore bioequivalence for these parameters
could not be confirmed. However, the shorter absorption time and higher pea
k plasma concentration did not affect the extent of absorption of the soft
gelatin capsule. In contrast to this result, the pharmacokinetic profile of
the soft gelatin capsules was very similar to that of the fast-dissolving
ibuprofen lysinate tablets. The 90% confidence intervals for logarithmicall
y transformed Cmax and areas under the drug concentration-time curve from z
ero to the time of the last measurable concentration (AUC(t)) and to infini
ty (AUC(infinity)) were within the required bioequivalence range. The three
formulations were well tolerated and no clinically significant adverse eve
nts were observed.
Conclusions: In accordance with previous results, this study confirmed the
pharmacokinetic differences between a standard ibuprofen tablet formulation
and fast-dissolving formulations.