Latest revision as of 11:49, 12 March 2024
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Message definition (Metformin ) === Pharmacokinetics === Metformin has an oral [[bioavailability]] of 50–60% under [[fasting]] conditions, and is absorbed slowly. Peak plasma concentrations (C<sub>max</sub>) are reached within 1–3 hours of taking immediate-release metformin and 4–8 hours with extended-release formulations. The [[plasma protein binding]] of metformin is negligible, as reflected by its very high [[volume of distribution|apparent volume of distribution]] (300–1000 L after a single dose). [[Steady state]] is usually reached in 1–2 days.
薬物動態
メトホルミンの経口生物学的利用能 は、空腹 条件下で50~60%であり、ゆっくりと吸収される。血漿中濃度のピーク(Cmax )は、メトホルミンの即時放出型製剤では服用後1~3時間以内に、徐放型製剤では4~8時間以内に到達する。メトホルミンの血漿タンパク質結合 は、非常に高い見かけの分布容積 (単回投与で300~1000 L)に反映されるように、無視できる。定常状態 は通常1~2日で到達する。