Overview
Spironolactone is a synthetic steroid with potent potassium-sparing diuretic properties. It was first introduced in the 1950s and has since become a cornerstone in the treatment of various cardiovascular and endocrine conditions. The drug works by competitively inhibiting aldosterone receptors in the kidneys, leading to increased sodium and water excretion while retaining potassium. Spironolactone is classified as a selective aldosterone antagonist and is often used in combination with other diuretics to enhance efficacy while minimizing electrolyte imbalances. Its therapeutic applications extend beyond diuresis, including anti-androgenic effects in dermatology.
Physical and Chemical Properties
Spironolactone is a white to off-white crystalline powder with a molecular weight of 416.57 g/mol. It has a melting point range of 203-205°C and is slightly soluble in water but more soluble in organic solvents like ethanol and chloroform. The compound is stable under normal storage conditions but should be protected from light and moisture to prevent degradation. The molecular structure of spironolactone includes a steroidal backbone with a sulfur-containing lactone ring, which is critical for its biological activity. Its chemical stability and solubility profile make it suitable for oral administration, typically formulated as tablets or suspensions.
Main Applications
Spironolactone is primarily used to treat hypertension, heart failure, and edema associated with conditions like cirrhosis and nephrotic syndrome. Its potassium-sparing action makes it particularly useful in patients at risk of hypokalemia. Additionally, it is prescribed for primary hyperaldosteronism, where excessive aldosterone production leads to hypertension and electrolyte imbalances. Beyond cardiovascular applications, spironolactone is used off-label for hormonal acne and hirsutism in women due to its anti-androgenic effects. It is also being investigated for potential benefits in other conditions, such as polycystic ovary syndrome (PCOS) and certain types of cancer.
Safety and Storage
Spironolactone must be used with caution due to its potential to cause hyperkalemia, especially in patients with renal impairment or those taking potassium supplements. Regular monitoring of serum potassium levels is essential during therapy. Other adverse effects may include gynecomastia, menstrual irregularities, and gastrointestinal disturbances. Proper storage of spironolactone involves keeping the drug in a cool, dry place, away from direct light and moisture. Bulk pharmaceutical-grade material should be stored in sealed containers with desiccants to maintain stability. Expired or degraded product should be disposed of according to local regulations.
B2B Procurement Guide
When procuring spironolactone for B2B purposes, buyers should prioritize suppliers with certifications for pharmaceutical-grade production. Key specifications to verify include CAS number (52-01-7), purity (typically ≥98%), and absence of harmful impurities. Pricing varies based on quantity and supplier, with reference ranges commonly between $50-$200 per kilogram. Due diligence should include auditing the supplier’s manufacturing practices, quality control measures, and compliance with Good Manufacturing Practice (GMP) standards. Buyers should also consider logistics, such as cold chain requirements for bulk shipments, and ensure proper documentation for regulatory compliance.
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