Bioavailability studies of calcium dobesilate--a case of flip-flop kinetics.

Absolute and relative bioavailability of two commercial calcium dobesilate tablets were evaluated in ten healthy volunteers in a cross-over trial using a newly developed HPLC detection method. Both tablet forms were absorbed completely but very slowly thus leading to a flip-flop kinetics. It could be shown that AUC values derived from flip-flop models were comparable with those of normal i. v. kinetics.