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BLOOD AND TISSUE CONCENTRATIONS OF TRIMETHOPRIM FOLLOWING ITS ADMINISTRATION ALONE AND IN COMBINATION WITH JOSAMYCIN
Faculty
Veterinary Medicine
Year:
1992
Type of Publication:
Article
Pages:
154-156
Authors:
ElSayed, MGA, ELAZIZ, MIA, ELAZEM, AMA
Journal:
DEUTSCHE TIERARZTLICHE WOCHENSCHRIFT M H SCHAPER GMBH CO KG
Volume:
99
Research Area:
Veterinary Sciences
ISSN
ISI:A1992KB39500008
Keywords :
BLOOD , TISSUE CONCENTRATIONS , TRIMETHOPRIM FOLLOWING , ADMINISTRATION
Abstract:
Following a single oral dose of trimethoprim (10 mg/kg b. wt.) in normal fowls, the highest serum concentration achieved 4 hours post-administration with value of 0.64 mug/ml. The absorption half-life time was 0.64 hours. The elimination half life was 4.73 hours. During repeated oral administration of 1 0 mg/kg b. wt., once daily for five consecutive days, trimethoprim peaked in serum, 4 h after each dose. Trimethoprim persisted in all fowl's tissues for 96 hours after stopping of drug administration. After oral administration of josamycin (18 mg/kg b. wt.) and trimethoprim (10 mg/kg b. wt.) in normal fowls, a maximum serum concentration of trimethoprim was recorded at 2 hours with half-life of absorption (t0.5(ab)) valued 0.74 hour. The elimination half-life (t0.5beta) was 4,37 hours. During repeated oral administration of josamycin (1 8 mg/kg b. wt.) and trimethoprim (10 mg/kg b. wt.) once daily for five consecutive days in normal fowls, the highest plasma concentrations of trimethoprim occured 2 hours post each dose. The daily maximum plasma concentrations during the repeated oral administration of both tested drugs were nearly constant.
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