*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>S-Levocetirizine is the active R-enantiomer of cetirizine, a third-generation antihistamine. Produced via enzymatic resolution or chiral synthesis, it exhibits superior potency with reduced sedation. <strong>Molecular Formula:</strong> C17H19ClN2O3; <strong>CAS No.:</strong> 108661-95-4.</p>
<h3>Application</h3>
<ul>
<li>Allergy Management: Treatment of perennial and seasonal allergic rhinitis.</li>
<li>Dermatology: Relief of symptoms associated with chronic idiopathic urticaria.</li>
<li>Pharmaceutical Manufacturing: Bulk API supply for tablet and oral solution formulations.</li>
</ul>
<h3>Precautions</h3>
<p>Contraindicated in patients with severe renal impairment without dosage adjustment. Store in cool, dry conditions below 25°C to maintain stability. Avoid direct sunlight exposure during handling.</p>