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次サリチル酸ビスマス

Bismuth Subsalicylate

Bismuth subsalicylate

止瀉薬 / 消化管保護薬POフェレット

別名: Pepto-Bismol · Kaopectate · Bismu-kote · Bismupaste · Bismatrol · Corrective Suspension · PalaBIS · BSS · basic bismuth salicylate · bismuth oxysalicylate · bismuthi subsalicylas

VetSheet 獣医チームが監修更新日 2026年4月5日エビデンスに基づく獣医学リファレンス

0.25 mL/kg up to 2 mL/kgPO· q4-6h (0.25 mL/kg) or q6-8h (2 mL/kg)
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用量は獣医専門家向けの臨床参考資料です。必ず最新の医薬品情報および個別症例に基づいて確認してください。

動物種別用量

🌎 NA — North America🌍 EU — Europe

適応用量経路頻度期間地域
For acute diarrhea1 mL per 5 kg of body weightPO3 times a dayshould probably not exceed 5 days of therapy🌎 NA
For acute diarrhea0.25 mL/kg up to 2 mL/kgPOq4-6h (0.25 mL/kg) or q6-8h (2 mL/kg)🌎 NA
For treating Helicobacter gastritis infections (triple therapy)0.22 mL/kgPOq4-6h3 weeks🌎 NA
For treating Helicobacter gastritis infections (triple therapy)262 mg tablets given based upon body weight (<5kg = 0.25 tablet; 5-9.9 kg = 0.5 tablet; 10-24.9kg = 1 tablet; >25kg = 2 tablets)POq12h2 weeks🌎 NA
As a gastroprotectant/coating agent in the adjunctive treatment of uremic gastritis2 mL/kgPOq6-8h🌎 NA
  • For acute diarrhea: Dose based on 17.5 mg/mL liquid
  • For acute diarrhea: Pepto-Bismol
  • For treating Helicobacter gastritis infections (triple therapy): Given with Metronidazole 15.4 mg/kg q8h and amoxicillin 11 mg/kg q8h
  • For treating Helicobacter gastritis infections (triple therapy): Given with Metronidazole 10 mg/kg PO q12h and amoxicillin 15 mg/kg q12h

適応用量経路頻度期間地域
For diarrhea0.25 mL/kgPOq4-6h🌎 NA
For diarrhea0.5-1 mL/kgPOq12h3 days🌎 NA
For diarrhea in kittens and young cats1-2 mLPO3-4 times a day🌎 NA
For eliminating Helicobacter gastritis infections (triple therapy)0.22 mL/kgPOq4-6h3 weeks🌎 NA
  • For diarrhea: Cats are sensitive to salicylates and probably should not receive frequent or high dosages
  • For diarrhea: Using 'Pepto-Bismol Regular' or equivalent strength (17.5 mg/mL) liquid
  • For diarrhea in kittens and young cats: Refrigeration may increase palatability
  • For eliminating Helicobacter gastritis infections (triple therapy): Given with Metronidazole 15.4 mg/kg q8h and amoxicillin 11 mg/kg q8h

フェレット

適応用量経路頻度期間地域
For eliminating Helicobacter gastritis infections (triple therapy)7.5 mg/kgPOq8h3-4 weeks🌎 NA
For eliminating Helicobacter gastritis infections (triple therapy)17.5 mg/kgPOq8h21 days🌎 NA
  • For eliminating Helicobacter gastritis infections (triple therapy): Given with Metronidazole 20 mg/kg and amoxicillin 30 mg/kg
  • For eliminating Helicobacter gastritis infections (triple therapy): Given with Metronidazole 20 mg/kg PO q12h, amoxicillin 20 mg/kg PO q12h, famotidine 0.5 mg/kg PO once daily, and sucralfate 25 mg/kg PO q8h

適応用量経路頻度期間地域
For diarrhea in foals3-4 ounces per 45 kg (100 lb.) body weightPOq6-8h🌎 NA
For diarrhea in foals or adults1 ounce per 8 kg of body weightPO3-4 times daily🌎 NA
For diarrhea in foals3-4 oz.POq6-8h🌎 NA
For diarrhea in foals60 mLPOtwo to four times a daytwo days🌎 NA

適応用量経路頻度期間地域
For diarrhea in calves60 mLPOtwo to four times a daytwo days🌎 NA
For diarrhea2-3 ouncesPO2-4 times a day🌎 NA

適応用量経路頻度期間地域
For diarrhea in baby pigs2-5 mLPOtwo to four times a day2 days🌎 NA

用量は獣医専門家向けの臨床参考資料です。必ず最新の医薬品情報および個別症例に基づいて確認してください。

診察中ですか?VetSheet の AI が薬剤・用量・投与期間を構造化された診察記録に直接記入します。VetSheet の仕組みを見る

概要

次サリチル酸ビスマスは、市販の消化管保護薬および止瀉薬です。獣医学では、主に急性分泌性下痢の管理や、ヘリコバクター(Helicobacter)胃腸感染症を除菌するための「3剤併用療法」の成分として使用されます。

​臨床上の注意点:​

  • 親化合物は消化管内で分解され、​サリチル酸​を放出します。
  • ​猫への使用は要注意:​ 猫はグルクロン酸抱合経路が欠如しているため、サリチル酸に対して非常に敏感です。高用量または反復投与により、容易にサリチル酸中毒を引き起こす可能性があります。
  • 放射線不透過性であり、消化管のX線検査に影響を与える可能性があります。
  • 飼い主は、ビスマスによって引き起こされる無害な黒色便をメレナ(消化管出血)と誤認することがよくあります。

作用機序

Bismuth subsalicylate is cleaved in the small intestine into bismuth carbonate and salicylate.

  • ​Bismuth component:​ Provides physical mucosal protection, binds bacterial endotoxins, and exhibits weak antibacterial properties (which contributes to its efficacy against Helicobacter spp.).
  • ​Salicylate component:​ Inhibits ​cyclooxygenase (COX)​ enzymes → decreases prostaglandin synthesis → reduces intestinal inflammation and hypersecretion, effectively mitigating clinical signs of secretory diarrhea.

安全性・警告

禁忌

  • Pre-existing bleeding disorders
  • Known hypersensitivity to salicylates
  • Use with extreme caution, if at all, in cats

有害事象

  • Constipation or fecal impaction (especially in infants or debilitated patients)
  • Stool discoloration (gray-black or greenish-black)
  • Salicylism / salicylate toxicity (especially in cats or at high doses)

注意事項

​Species Sensitivity:​ Use with extreme caution in cats due to the salicylate component; cats are highly susceptible to salicylate toxicity.

​Bleeding Risk:​ Salicylate absorption occurs; use cautiously in patients with pre-existing bleeding disorders.

​Diagnostics:​ Bismuth is radiopaque and may interfere with GI tract radiologic examinations. It may also cause false-positive or false-negative results on various urine glucose and ketone tests.

​Pregnancy/Nursing:​ Use with caution in pregnant and nursing animals (refer to aspirin precautions).

​General:​ Antidiarrheal products are not a substitute for adequate fluid and electrolyte therapy when required.

医薬品相互作用

Tetracycline

Bismuth can decrease the absorption of orally administered tetracyclines. Separate administration by at least 2 hours and give tetracycline first.

Aspirin

Concomitant administration may increase salicylate serum levels, increasing the risk of toxicity.

監視

  • Clinical efficacy (resolution of diarrhea)
  • Fluid and electrolyte status in severe diarrhea
  • Signs of salicylate toxicity (especially in cats)

薬物動態

吸収

The amount of bismuth absorbed is negligible, while the salicylate component is rapidly and completely absorbed.

分布

Salicylates are highly bound to plasma proteins.

代謝

Salicylates are metabolized in the liver to salicylic acid.

消失

Salicylic acid, conjugated salicylate metabolites, and any absorbed bismuth are all excreted renally.

過剰投与

Bismuth subsalicylate liquid/suspension contains approximately 8.7 mg/mL salicylate.

​Note:​ Two tablespoonsful (30 mL) is approximately equivalent to one 325 mg aspirin tablet.

High doses can lead to salicylism (salicylate toxicity), which may manifest as gastrointestinal ulceration, bleeding, acid-base disturbances, and neurological signs. Cats are particularly vulnerable to overdose due to their deficient glucuronidation metabolism.

製品

製剤

  • Oral suspension
  • Oral paste
  • Tablets
  • Caplets

動物用医薬品

  • Bismuth Subsalicylate Paste: 5% (50 mg/mL), 10% (100 mg/mL), 20% (200 mg/mL)
  • Bismuth Subsalicylate Oral Suspension: 1.75% (17.5 mg/mL; 262 mg/15 mL)
  • Bismuth Subsalicylate Tablets: 262 mg

ヒト用医薬品

  • Bismuth Subsalicylate Liquid/Suspension: 87 mg/5 mL, 130 mg/15 mL, 262 mg/15 mL, 524 mg/15 mL, 525 mg/15 mL
  • Bismuth Subsalicylate Tablets and Caplets: 262 mg (regular & chewable)

規制ステータス

規制データなし: 🇺🇸 US · 🇪🇺 EU · 🇬🇧 UK · 🇭🇰 HK · 🇹🇼 TW · 🇯🇵 JP · 🇰🇷 KR · 🇦🇺 AU

保管・安定性

Store protected from light at room temperature; do not freeze. Incompatible with mineral acids and iron salts. Decomposes with effervescence when exposed to alkali bicarbonates.

飼主向け情報

  • ​よく振る:​ 用量を測る前に、必ず液体製品をよく振ってください。
  • ​嗜好性:​ 懸濁液を冷蔵すると、ペットにとって飲みやすくなる場合があります。投与前に牛乳と混ぜ​ない​でください。
  • ​便の変化:​ この薬により、ペットの便が灰黒色または緑黒色に変わることがありますが、これは正常です。ただし、便が「タール状」の黒色になったり、鮮血が見られたりした場合は、すぐに獣医師に連絡してください。
  • ​獣医師への連絡の目安:​ 下痢が1〜2日以上続く場合、またはペットがぐったりしている、水を飲まなくなった場合は、獣医師に連絡してください。ペットが脱水症状を起こしている場合、この薬を獣医療の代わりに使用しないでください。

VetSheet医薬品リファレンスは獣医専門家の臨床意思決定支援を目的としており、専門的判断または製造業者の最新医薬品情報の代替にはなりません。