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Worldmeds

Famotidine

ファモチジン

INN: Famotidine

H2 Receptor AntagonistPublished

Last updated: 3/14/2026

Mechanism of Action

JA日本語

胃壁細胞のヒスタミンH2受容体を競合的に拮抗し、胃酸分泌を抑制します。基礎分泌および刺激による分泌の両方を抑制し、胃内pHを上昇させます。

ENEnglish

Competitively antagonizes histamine H2 receptors on gastric parietal cells, suppressing gastric acid secretion. Inhibits both basal and stimulated secretion, raising intragastric pH.

Efficacy & Effect Tags

Side Effects

JA日本語

便秘、下痢、頭痛、めまい、倦怠感。まれに血小板減少、肝機能障害。

ENEnglish

Constipation, diarrhea, headache, dizziness, fatigue. Rarely thrombocytopenia, hepatic dysfunction.

Contraindications

JA日本語

本剤の成分に対し過敏症の既往歴のある患者。重篤な腎障害のある患者は用量調整が必要。

ENEnglish

Patients with a history of hypersensitivity to any component. Dose adjustment required for patients with severe renal impairment.