• 제목/요약/키워드: Pharmaeokinties

검색결과 1건 처리시간 0.016초

Omeprazole 수지염의 흰쥐와 토끼에서의 위장관내 산도변화에 따른 흡수변화 및 교차시험법에 의한 약물동태연구 (Pharmacokinetics of Omeprazole-Resin by Crossover Design and the Variation of Absorption upon pH Change in the Guts of the Rat and the Rabbit)

  • 권광일;심상호
    • 약학회지
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    • 제39권4호
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    • pp.401-410
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    • 1995
  • Pharmacolinetic profiles of omeprazole enteric coated granules including Ramezole$^\circledR$, Losec$^\circledR$, omeprazole-Na and omeprazole-resin salt were studied using the crossover design in rats and rabbits. The absorption variance of the preparations at the altered pH condition of the gastrointestinal tract was also studied. After oral administration of four omeprazole enteric coated pellets (10mg/kg) with and without concomitant administration NaHCO$_{3}$ (5 mg/ml, 60 mM) in the rats, the differences of absorplion rate and extent were evaluated. In the NaHCO$_{3}$, administration group, the T$_{max}$ appeared to be 2~10 times shorter than water administration group, and the $C_{max}$ also increased to about 4 times, and the AUC increased to about 2.5 times. Pharmacokinetic parameters of four omeprazole enteric coated pellets in rats showed no statistical significance (ANOVA, P>0.05) in both groups. In the crossover study, the second dosed drug showed 4~5 times increased bioavailability than first dosed drug, which shows the strong carry-over effect of acid secretion of the first dosed drug. The differences of the pharmacokinetic parameters of the two test formulations (Losec$^\circledR$ and omeprazole-resin) showed no statistical significance.

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