プロパフェノン

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H302：飲み込むと有害

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P301+P312：飲み込んだ場合：気分が悪い時は医師に連絡する こと。

  P302+P352：皮膚に付着した場合：多量の水と石鹸で洗うこと。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

プロパフェノン 価格

プロパフェノン 化学特性,用途語,生産方法

• 用途

  ナトリウムチャネル抑制薬（Ⅰc群）抗不整脈薬

• 効能

  抗不整脈薬, ナトリウムチャネル遮断薬

• 使用

  Cardiac depressant (anti-arrhythmic).

• 定義

  ChEBI: An aromatic ketone that is 3-(propylamino)propane-1,2-diol in which the hydrogen of the primary hydroxy group is replaced by a 2-(3-phenylpropanoyl)phenyl group. It is a class 1C antiarrhythmic drug with local anesthetic effects, and is used as the hydroch oride salt in the management of supraventricular and ventricular arrhythmias.

• 世界保健機関（WHO）

  Propafenone, a membrane-stabilizing antiarrhythmic agent, was introduced into medicine in the mid 1980s. Shortly afterwards, its use became associated with cases of severe cardiac arrhythmias, which led to notable restrictions in the drug's indications in at least two countries. See also WHO comment for flecainide.

• 一般的な説明

  Propafenone, 2-[2＇-hydroxy-3-(propylamino)propoxy]-3-phenylpropiophenone (Rythmol), a classIC antiarrhythmic drug, contains a chiral center and is marketedas the racemic mixture. Therapy with the racemicmixture of propafenone produces effects that can be attributedto both (S) and (R) enantiomers. Although (R) and (S)enantiomers exert similarNa⁺channel–blocking effects, the(S) enantiomer also produces aβ-adrenergic blockade. As aresult, the (S) enantiomer is reported to be 40-fold morepotent than the (R) enantiomer as an antiarrhythmic agent.The enantiomers also display stereoselective dispositioncharacteristics. The (R) enantiomer is cleared more quickly.Hepatic metabolism is polymorphic and determined genetically.Ten percent of Caucasians have a reduced capacity tohydroxylate the drug to form 5-hydroxypropafenone. Thispolymorphic metabolism accounts for the interindividualvariability in the relationships between dose and concentrationand, thus, variability in the pharmacodynamic effects ofthe drug. The 5-hydroxy metabolites of both enantiomersare as potent as the parent compound in blocking Na⁺channels.Propafenone also depresses the slow inward current ofCa2⁺ions.

• 臨床応用

  Propafenone has been used for acute termination orlong-term suppression of ventricular arrhythmias. It isbound in excess of 95% to 1-acid glycoprotein in theplasma. It is absorbed effectively, but bioavailability is estimatedto be less than 20% because of first-pass metabolism.Less than 1% is eliminated as unchanged drug. Therapywith propafenone may produce effects that can be attributedto both (S) and (R) enantiomers. Thus, the effects may bemodulated because of an enantiomer–enantiomer interactionwhen patients are treated with the racemate.

• 副作用

  Concurrent administration of propafenone with digoxin, warfarin, propranolol, or metoprolol increases the serum concentrations of the latter four drugs. Cimetidine slightly increases the propafenone serum concentrations. Additive pharmacological effects can occur when lidocaine, procainamide, and quinidine are combined with propafenone.
  As with other members of class IC, propafenone may interact in an unfavorable way with other agents that depress A-V nodal function, intraventricular conduction, or myocardial contractility. Overall, 21 to 32% of patients have adverse effects. The most common are dizziness or light-headedness, metallic taste, nausea, and vomiting; the most serious are proarrhythmic events.

• 予防処置

  Propafenone is contraindicated in the presence of severe or uncontrolled congestive heart failure; cardiogenic shock; sinoatrial, A-V, and intraventricular disorders of conduction; and sinus node dysfunction, such as sick sinus syndrome. Other contraindications include severe bradycardia, hypotension, obstructive pulmonary disease, and hepatic and renal failure. Because of its weak β-blocking action, propafenone may cause possible dose-related bronchospasm.This problem is greatest in patients who are slow metabolizers.

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