Bismuth Subcitrate Potassium (CAS 57644-54-9): A Comprehensive Guide to This Essential Gastroprotective Agent

What is Bismuth Subcitrate Potassium?

Bismuth subcitrate potassium is a complex bismuth compound that plays a crucial role in gastrointestinal pharmacology. With the CAS number 57644-54-9 and molecular formula C₁₂H₈BiK₅O₁₄, this compound is one of the most important bismuth derivatives used in modern medicine. It appears as a white to off-white powder and is specifically formulated for optimal bismuth delivery in pharmaceutical applications.

This compound is part of the larger family of bismuth subcitrate compounds, which have been used for over a century in the treatment of various gastrointestinal disorders. The unique molecular structure of bismuth subcitrate potassium allows for controlled release of bismuth ions, enhancing its therapeutic effectiveness while minimizing potential side effects.

CAS Number: 57644-54-9
Molekylær formel: C₁₂H₈BiK₅O₁₄
Molecular Weight: Approximately 733.58 g/mol
Classification: Food Additive / Pharmaceutical Intermediate

What Are the Benefits?

Gastroprotective Properties

The primary benefit of bismuth subcitrate potassium is its potent gastroprotective action. It works by forming a protective coating over gastric ulcers and erosions, creating a physical barrier that shields damaged tissue from gastric acid and pepsin. This protective layer promotes natural healing of the gastrointestinal mucosa.

Helicobacter pylori Eradication

Bismuth subcitrate potassium exhibits significant antibacterial activity against Helicobacter pylori (H. pylori), a bacterium linked to peptic ulcers, gastritis, and gastric cancer. The compound works through multiple mechanisms:

• Inhibits bacterial enzyme activity by displacing essential metal ions
• Disrupts bacterial energy metabolism
• Damages bacterial cell walls and membranes
• Enhances the effectiveness of antibiotic combinations in triple/quadruple therapy

Anti-inflammatory Effects

Beyond its direct antimicrobial action, bismuth subcitrate potassium helps reduce inflammation in the gastrointestinal tract. This anti-inflammatory property contributes to symptom relief and supports the healing process in conditions like gastritis and inflammatory bowel disease.

Mucosal Healing Enhancement

Studies have shown that bismuth compounds stimulate mucosal healing through various mechanisms, including increased mucus production, enhanced prostaglandin synthesis, and improved blood flow to gastric tissues. This makes bismuth subcitrate potassium particularly valuable in treating chronic gastrointestinal conditions.

Antisecretory Activity

The compound helps reduce gastric acid secretion indirectly, which is beneficial for patients with hyperacidic conditions. This antisecretory effect complements its protective and antimicrobial actions, providing comprehensive gastrointestinal support.

What Are the Uses?

Pharmaceutical Applications

Bismuth subcitrate potassium is primarily used in:

• Peptic ulcer treatment: Promotes healing of gastric and duodenal ulcers
• H. pylori eradication therapy: A key component of bismuth-based antibiotic regimens
• Gastritis management: Relieves symptoms and promotes mucosal healing
• Gastroesophageal reflux disease (GERD): Provides symptomatic relief
• Functional dyspepsia: Helps manage indigestion and related symptoms

Food Additive Applications

In the food industry, bismuth subcitrate potassium serves as:

• A dietary supplement ingredient for digestive health
• A functional food component in gastrointestinal wellness products
• An ingredient in certain nutritional formulations

Research Applications

The compound is valuable in research settings for:

• Studying bismuth biochemistry and pharmacology
• Developing new antimicrobial strategies against resistant bacteria
• Investigating mucosal protection mechanisms

Virkningsmekanisme

Bismuth subcitrate potassium exerts its therapeutic effects through several interconnected mechanisms:

1. Mucosal Protection: Upon administration, bismuth ions precipitate with proteins and mucus to form a protective layer over ulcerated tissue. This coating shields the damaged mucosa from further attack by gastric acid and pepsin.

2. Antimicrobial Action: Bismuth ions penetrate bacterial cells and interfere with essential enzymatic processes. The compound specifically targets H. pylori by:

• Inhibiting urease enzyme activity (critical for bacterial survival in acidic environment)
• Disrupting bacterial adhesion to gastric epithelium
• Inducing bacterial cell death through multiple pathways

3. Stimulation of Protective Factors: The compound promotes the production of:

• Prostaglandins (protective mucosal compounds)
• Bicarbonate and mucus (natural buffering and protective substances)
• Epidermal growth factor (supports tissue regeneration)

Safety and Side Effects

Common Side Effects

Bismuth subcitrate potassium is generally well-tolerated when used as directed. However, some individuals may experience:

• Gastrointestinal effects: Nausea, constipation, or darkening of stool
• Tongue discoloration: Temporary darkening may occur
• Headache: Occasionally reported
• Dizziness: Rarely, some users may experience mild dizziness

Forholdsregler

• Should be taken as prescribed by a healthcare professional
• Avoid use in patients with known bismuth hypersensitivity
• Not recommended for prolonged use without medical supervision
• May interact with certain medications (tetracyclines, iron supplements)
• Maintain proper dosing intervals (typically 2 hours apart from other medications)

Contraindications

• Severe renal impairment
• Known allergy to bismuth compounds
• Pregnancy and breastfeeding (unless specifically recommended by a physician)

Drug Interactions

Bismuth subcitrate potassium may affect the absorption of:

• Tetracycline antibiotics
• Iron and mineral supplements
• Certain antacids
• Proton pump inhibitors (when used concurrently)

To minimize interactions, maintain a 2-3 hour gap between bismuth subcitrate potassium and other oral medications.

Chemical Specifications

Property	Værdi
CAS-nummer	57644-54-9
Molekylær formel	C12H8BiK5O14
Molekylvægt	733.58 g/mol
Udseende	Hvidt til råhvidt pulver
Opløselighed	Soluble in water; forms colloidal solutions
Bismuth Content	Approximately 25-28%
Potassium Content	Approximately 22-24%
Renhed	≥98% (typical)
Klassificering	Food Additive / Pharmaceutical Intermediate

Frequently Asked Questions

How does Bismuth Subcitrate Potassium work?

Bismuth subcitrate potassium works through a multi-faceted mechanism. It forms a protective coating over gastric ulcers, directly kills H. pylori bacteria, and stimulates the body’s natural mucosal healing processes. The bismuth ions are released gradually, providing sustained therapeutic effects.

Is Bismuth Subcitrate Potassium safe for long-term use?

While bismuth subcitrate potassium is generally safe, long-term use should be monitored by a healthcare professional. Prolonged use may lead to bismuth accumulation in some patients, particularly those with renal impairment. Typical treatment courses for H. pylori eradication are 10-14 days.

Can Bismuth Subcitrate Potassium be taken with food?

For optimal results, bismuth subcitrate potassium is typically taken on an empty stomach, usually 30 minutes before meals. However, your healthcare provider may recommend specific timing based on your condition and other medications.

What makes Bismuth Subcitrate Potassium effective against H. pylori?

The compound is effective because bismuth ions can penetrate the bacterial cell wall and disrupt essential enzymatic processes. H. pylori is particularly vulnerable because it requires specific metal ions for survival, which bismuth can displace. Additionally, bismuth works synergistically with antibiotics in combination therapy.

Does Bismuth Subcitrate Potassium cause black tongue or stool?

Yes, this is a well-known harmless side effect. Bismuth compounds can temporarily darken the tongue and stool. This discoloration is temporary and resolves after discontinuation of the medication.

Why Choose Our Bismuth Subcitrate Potassium?

• High Purity: Our Bismuth Subcitrate Potassium meets or exceeds pharmaceutical-grade specifications with ≥98% purity
• Consistent Quality: Batch-to-batch consistency ensures reliable performance in your formulations
• Quality Assurance: Every lot is tested with complete Certificate of Analysis (COA)
• Competitive Pricing: Factory-direct pricing for both research and bulk orders
• Technical Support: Our team provides expert guidance on applications and handling
• Reliable Supply: Consistent availability to meet your production needs
• Global Shipping: Efficient worldwide distribution capabilities

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Disclaimer: This information is provided for educational purposes only and should not be considered medical advice. Always consult with a qualified healthcare professional before using any pharmaceutical compound.