*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Fexofenadine is a <strong>second-generation antihistamine</strong> manufactured via chemical synthesis. Its molecular formula is C<sub>22</sub>H<sub>27</sub>NO<sub>4</sub>, and the CAS number is 83650-59-3.</p>
<h3>Application</h3>
<ul>
<li>Allergy relief in pharmaceutical formulations</li>
<li>Treatment of seasonal allergic rhinitis</li>
<li>Management of chronic idiopathic urticaria</li>
</ul>
<h3>Precautions</h3>
<p>Avoid concurrent use with fruit juices; store below 25°C in dry conditions. Do not exceed recommended dosages to prevent rare cardiac events.</p>