Abstract:
:Two kinds of dosage forms (tablets and retarded capsules) of furosemide (F) were compared in vitro dissolution profile and in vivo absorption studies. The dissolution of F from retarded capsules was extremely restricted in the first fluid of the JP XII disintegration test (within 0.8%), while the dissolution of F from tablets and retarded capsules in the second fluid of JP XII disintegration test were both complete. Metabolite specific assay of F showed F, conjugation of F with glucuronic acid (FG) and acyl migration isomers of FG (FG-iso) in urine or plasma. The mean cumulative urinary excretion of F following administration of the tablets during 24 h was twice that of retarded capsules. The mean area under the plasma concentration-time curve (AUC) of F following administration of tablets was 1.5 times that of retarded capsules. The mean cumulative urine volume during 24 h, however, was not significantly different between the two dosage forms. Clockwise hysteresis relationships between the diuretic response and the urinary excretion rate of F was observed after administration of retarded capsules. A straight relation between logarithm of the diuresis and logarithm of the urinary excretion of F was observed after maximum excretion rate of F following administration of both dosage forms.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Yagi N,Kiuchi T,Satoh H,Terashima Y,Kenmotsu H,Sekikawa H,Takada Mdoi
10.1248/bpb.19.616subject
Has Abstractpub_date
1996-04-01 00:00:00pages
616-22issue
4eissn
0918-6158issn
1347-5215journal_volume
19pub_type
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