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<meta name="robots" content="INDEX,FOLLOW,NOARCHIVE" /><meta name="citation_inbook_title" content="LiverTox: Clinical and Research Information on Drug-Induced Liver Injury [Internet]" /><meta name="citation_title" content="Meclizine" /><meta name="citation_publisher" content="National Institute of Diabetes and Digestive and Kidney Diseases" /><meta name="citation_date" content="2017/01/16" /><meta name="citation_pmid" content="31643231" /><meta name="citation_fulltext_html_url" content="https://www.ncbi.nlm.nih.gov/books/NBK547895/" /><link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" /><meta name="DC.Title" content="Meclizine" /><meta name="DC.Type" content="Text" /><meta name="DC.Publisher" content="National Institute of Diabetes and Digestive and Kidney Diseases" /><meta name="DC.Date" content="2017/01/16" /><meta name="DC.Identifier" content="https://www.ncbi.nlm.nih.gov/books/NBK547895/" /><meta name="description" content="Meclizine is a first generation antihistamine that is used largely to treat vertigo and motion sickness. Meclizine has not been linked to instances of clinically apparent acute liver injury." /><meta name="og:title" content="Meclizine" /><meta name="og:type" content="book" /><meta name="og:description" content="Meclizine is a first generation antihistamine that is used largely to treat vertigo and motion sickness. Meclizine has not been linked to instances of clinically apparent acute liver injury." /><meta name="og:url" content="https://www.ncbi.nlm.nih.gov/books/NBK547895/" /><meta name="og:site_name" content="NCBI Bookshelf" /><meta name="og:image" content="https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/bookshelf/thumbs/th-livertox-lrg.png" /><meta name="twitter:card" content="summary" /><meta name="twitter:site" content="@ncbibooks" /><meta name="bk-non-canon-loc" content="/books/n/livertox/Meclizine/" /><link rel="canonical" href="https://www.ncbi.nlm.nih.gov/books/NBK547895/" /><link rel="stylesheet" href="/corehtml/pmc/css/figpopup.css" type="text/css" media="screen" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books.min.css" type="text/css" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books_print.min.css" type="text/css" /><style type="text/css">p a.figpopup{display:inline !important} .bk_tt {font-family: monospace} .first-line-outdent .bk_ref {display: inline} </style><script type="text/javascript" src="/corehtml/pmc/js/jquery.hoverIntent.min.js"> </script><script type="text/javascript" src="/corehtml/pmc/js/common.min.js?_=3.18"> </script><script type="text/javascript">window.name="mainwindow";</script><script type="text/javascript" src="/corehtml/pmc/js/bookshelf/2.26/book-toc.min.js"> </script><script type="text/javascript" src="/corehtml/pmc/js/bookshelf/2.26/books.min.js"> </script>
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<div class="pre-content"><div><div class="bk_prnt"><p class="small">NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.</p><p>LiverTox: Clinical and Research Information on Drug-Induced Liver Injury [Internet]. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; 2012-. </p></div></div></div>
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<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/CreativeWork"><div class="meta-content fm-sec"><h1 id="_NBK547895_"><span class="title" itemprop="name">Meclizine</span></h1><p class="small">Last Update: <span itemprop="dateModified">January 16, 2017</span>.</p></div><div class="body-content whole_rhythm" itemprop="text"><div id="Meclizine.OVERVIEW"><h2 id="_Meclizine_OVERVIEW_">OVERVIEW</h2><div id="Meclizine.Introduction"><h3>Introduction</h3><p>Meclizine is a first generation antihistamine that is used largely to treat vertigo and motion sickness. Meclizine has not been linked to instances of clinically apparent acute liver injury.</p></div><div id="Meclizine.Background"><h3>Background</h3><p>Meclizine (mek' li zeen) is a first generation antihistamine that belongs to the piperazine class of these agents (with cyclizine and hydroxyzine) which are used largely for their antiemetic and sedative effects. Meclizine is used mostly for the treatment of vertigo and symptoms of nausea, vomiting and dizziness associated with motion sickness. Meclizine was first approved for use in the United States in 1957 and is available in tablets and capsules of 12.5, 25 and 50 mg in multiple generic forms and under the trade name Antivert. Meclizine is available in both prescription and nonprescription forms. The recommended adult oral dose for motion sickness is 25 to 50 mg taken one hour before travel. The recommended dose for vertigo is 25 to 100 mg daily in divided doses. Common side effects include sedation, impairment of motor function, confusion, dizziness, blurred vision, dry mouth and throat, palpitations, tachycardia, abdominal distress, constipation and headache. Antihistamines can worsen urinary retention and glaucoma.</p></div><div id="Meclizine.Hepatotoxicity"><h3>Hepatotoxicity</h3><p>Despite widespread use, meclizine has not been linked to liver test abnormalities or to clinically apparent liver injury. The reason for its safety may relate to low daily dose and limited duration of use.</p><p>Likelihood score: E (unlikely to be a cause of clinically apparent liver injury).</p><p>References on the safety and potential hepatotoxicity of antihistamines are given together after the Overview section on Antihistamines.</p><p>Drug Class: <a href="/books/n/livertox/Antihistamines/">Antihistamines</a></p></div></div><div id="Meclizine.PRODUCT_INFORMATION"><h2 id="_Meclizine_PRODUCT_INFORMATION_">PRODUCT INFORMATION</h2><div id="Meclizine.BPI" class="box"><p>
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<b>REPRESENTATIVE TRADE NAMES</b>
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</p><p>Meclizine – Generic, Antivert®</p><p>
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<b>DRUG CLASS</b>
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</p><p>Antihistamines</p><p>
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<a href="https://dailymed.nlm.nih.gov/dailymed/search.cfm?labeltype=all&query=Meclizine" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">COMPLETE LABELING</a>
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</p><p>Product labeling at DailyMed, National Library of Medicine, NIH</p></div></div><div id="Meclizine.CHEMICAL_FORMULA_AND_STRUCTURE"><h2 id="_Meclizine_CHEMICAL_FORMULA_AND_STRUCTURE_">CHEMICAL FORMULA AND STRUCTURE</h2><div id="Meclizine.T1" class="table"><p class="large-table-link" style="display:none"><span class="right"><a href="/books/NBK547895/table/Meclizine.T1/?report=objectonly" target="object">View in own window</a></span></p><div class="large_tbl" id="__Meclizine.T1_lrgtbl__"><table><thead><tr><th id="hd_h_Meclizine.T1_1_1_1_1" rowspan="1" colspan="1" style="vertical-align:top;">DRUG</th><th id="hd_h_Meclizine.T1_1_1_1_2" rowspan="1" colspan="1" style="vertical-align:top;">CAS REGISTRY NUMBER</th><th id="hd_h_Meclizine.T1_1_1_1_3" rowspan="1" colspan="1" style="vertical-align:top;">MOLECULAR FORMULA</th><th id="hd_h_Meclizine.T1_1_1_1_4" rowspan="1" colspan="1" style="vertical-align:top;">STRUCTURE</th></tr></thead><tbody><tr><td headers="hd_h_Meclizine.T1_1_1_1_1" rowspan="1" colspan="1" style="vertical-align:top;">Meclizine</td><td headers="hd_h_Meclizine.T1_1_1_1_2" rowspan="1" colspan="1" style="vertical-align:top;">569-65-3</td><td headers="hd_h_Meclizine.T1_1_1_1_3" rowspan="1" colspan="1" style="vertical-align:top;">C25-H27-Cl-N2</td><td headers="hd_h_Meclizine.T1_1_1_1_4" rowspan="1" colspan="1" style="vertical-align:top;">
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<div class="graphic"><img src="/books/NBK547895/bin/Meclizine_Structure.jpg" alt="Meclizine Chemical Structure" /></div>
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</td></tr></tbody></table></div></div></div><div id="bk_toc_contnr"></div></div></div>
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