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</div><div><span>Dextromethorphan</span></div></div><span class="page-url print-only">URL of this page: https://medlineplus.gov/druginfo/meds/a682492.html</span><!-- Article --><article><div class="page-info"><div class="page-title"><a name="start" id="start">
</a><h1 class="with-also">Dextromethorphan</h1><span class="alsocalled" id="d-pronunciation">pronounced as (dex troe meth or' fan)
</span>
</div><div class="page-actions">
</div>
<noscript><span class="js-disabled-message">To use the sharing features on this page, please enable JavaScript.</span></noscript></div><div id="toc-box"><ul role="navigation" class="group"><li><a href="#why">Why is this medication prescribed?</a>
</li><li><a href="#how">How should this medicine be used?</a>
</li><li><a href="#other-uses">Other uses for this medicine</a>
</li><li><a href="#precautions">What special precautions should I follow?</a>
</li><li><a href="#special-dietary">What special dietary instructions should I follow?</a>
</li><li><a href="#if-i-forget">What should I do if I forget a dose?</a>
</li><li><a href="#side-effects">What side effects can this medication cause?</a>
</li><li><a href="#storage-conditions">What should I know about storage and disposal of this medication?</a>
</li><li><a href="#overdose">In case of emergency/overdose</a>
</li><li><a href="#other-information">What other information should I know?</a>
</li><li><a href="#brand-name-1">Brand names</a>
</li><li><a href="#brand-name-2">Brand names of combination products
</a></li><li><a href="#other-name">Other names</a>
</li></ul></div><section><div id="why" class="section"><div class="section-header"><div class="section-title"><h2>Why is this medication prescribed?</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>Dextromethorphan is used to temporarily relieve cough caused by the common cold, the flu, or other conditions. Dextromethorphan will relieve a cough but will not treat the cause of the cough or speed recovery. Dextromethorphan is in a class of medications called antitussives. It works by decreasing activity in the part of the brain that causes coughing.</p></div></div></section><section><div id="how" class="section"><div class="section-header"><div class="section-title"><h2>How should this medicine be used?</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>Dextromethorphan comes as a liquid-filled capsule, a chewable tablet, a dissolving strip, a solution (liquid), an extended-release (long-acting) suspension (liquid), and a lozenge to take by mouth. It is usually taken every 4 to 12 hours as needed. Follow the directions on the package or prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand.</p><p>Dextromethorphan should only be used according to the label or package directions. Do not take more than the recommended amount of dextromethorphan in a 24-hour period. Refer to the package or prescription label to determine the amount contained in each dose. Taking dextromethorphan in large amounts can cause serious side effects or death.</p><p>Dextromethorphan comes alone and in combination with antihistamines, cough suppressants, and decongestants. Ask your doctor or pharmacist for advice on which product is best for your symptoms. Check nonprescription cough and cold product labels carefully before using 2 or more products at the same time. These products may contain the same active ingredient(s) and taking them together could cause you to receive an overdose. This is especially important if you will be giving cough and cold medications to a child.</p><p>Nonprescription cough and cold combination products, including products that contain dextromethorphan, can cause serious side effects or death in young children. Do not give these products to children younger than 4 years of age. If you give these products to children 4-11 years of age, use caution and follow the package directions carefully.</p><p>If you are giving dextromethorphan or a combination product that contains dextromethorphan to a child, read the package label carefully to be sure that it is the right product for a child of that age. Do not give dextromethorphan products that are made for adults to children.</p><p>Before you give a dextromethorphan product to a child, check the package label to find out how much medication the child should receive. Give the dose that matches the child's age on the chart. Ask the child's doctor if you don't know how much medication to give the child.</p><p>If you are taking the liquid, do not use a household spoon to measure your dose. Use the measuring spoon or cup that came with the medication or use a spoon made especially for measuring medication.</p><p>If you are using the dissolving strips, place them on your tongue and swallow after they melt.</p><p>If you are taking the chewable tablets you can allow them to melt in your mouth or you can chew them before swallowing.</p><p>If you are taking the extended-release suspension, shake the bottle well before each use to mix the medication evenly.</p><p>If you are taking the lozenges, allow them to slowly melt in your mouth.</p><p>Stop taking dextromethorphan and call your doctor if your cough does not get better within 7 days, if your cough goes away and comes back, or if your cough occurs with a fever, rash, or headache.</p></div></div></section><section><div id="other-uses" class="section"><div class="section-header"><div class="section-title"><h2>Other uses for this medicine</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.</p></div></div></section><section><div id="precautions" class="section"><div class="section-header"><div class="section-title"><h2>What special precautions should I follow?</h2></div><div class="section-button"><button type="submit" aria-controls="section-precautions" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-precautions"><h3>Before taking dextromethorphan,</h3><ul><li>tell your doctor and pharmacist if you are allergic to dextromethorphan, any other medications, or any of the ingredients in the product you plan to take. Check the package label for a list of the ingredients.</li><li>tell your doctor or pharmacist if you are taking the following medications or have stopped taking them within the past two weeks: monoamine oxidase (MAO) inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate).</li><li>tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take while taking dextromethorphan. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.</li><li>tell your doctor if you smoke, if you have a cough that occurs with a large amount of phlegm (mucus), or if you have or have ever had breathing problems such as asthma, emphysema, or chronic bronchitis.</li><li>tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking dextromethorphan, call your doctor.</li><li>if you have phenylketonuria (PKU, an inherited condition in which a special diet must be followed to prevent damage to your brain that can cause severe intellectual disability), you should know that some brands of chewable tablets that contain dextromethorphan may be sweetened with aspartame, a source of phenylalanine.</li></ul></div></div></section><section><div id="special-dietary" class="section"><div class="section-header"><div class="section-title"><h2>What special dietary instructions should I follow?</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-5"><p>Unless your doctor tells you otherwise, continue your normal diet.</p></div></div></section><section><div id="if-i-forget" class="section"><div class="section-header"><div class="section-title"><h2>What should I do if I forget a dose?</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-6"><p>Dextromethorphan is usually taken as needed. If your doctor has told you to take dextromethorphan regularly, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.</p></div></div></section><section><div id="side-effects" class="section"><div class="section-header"><div class="section-title"><h2>What side effects can this medication cause?</h2></div><div class="section-button"><button type="submit" aria-controls="section-side-effects" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-side-effects"><h3>Dextromethorphan may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
</h3><ul><li>dizziness</li><li>lightheadedness</li><li>drowsiness</li><li>nervousness</li><li>restlessness</li><li>nausea</li><li>vomiting</li><li>stomach pain</li></ul><h3>If you experience any of the following symptoms, call your doctor immediately:
</h3><ul><li>rash</li></ul><p>Dextromethorphan may cause other side effects. Call your doctor if you experience any unusual problems while you are taking this medication.</p><p>If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (<a target="_blank" href="https://www.fda.gov/Safety/MedWatch">https://www.fda.gov/Safety/MedWatch</a>) or by phone (1-800-332-1088).</p></div></div></section><section><div id="storage-conditions" class="section"><div class="section-header"><div class="section-title"><h2>What should I know about storage and disposal of this medication?</h2></div><div class="section-button"><button type="submit" aria-controls="section-8" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-8"><p>Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom).</p><p>Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website (<a target="_blank" href="https://goo.gl/c4Rm4p">https://goo.gl/c4Rm4p</a>) for more information if you do not have access to a take-back program.</p><p>It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location – one that is up and away and out of their sight and reach. <a target="_blank" href="https://www.upandaway.org">https://www.upandaway.org</a></p></div></div></section><section><div id="overdose" class="section"><div class="section-header"><div class="section-title"><h2>In case of emergency/overdose</h2></div><div class="section-button"><button type="submit" aria-controls="section-9" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-9"><p>In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at <a target="_blank" href="https://www.poisonhelp.org/help">https://www.poisonhelp.org/help</a>. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.</p><h3>Symptoms of overdose may include:
</h3><ul><li>nausea</li><li>vomiting</li><li>drowsiness</li><li>dizziness</li><li>unsteadiness</li><li>changes in vision</li><li>difficulty breathing</li><li>fast heartbeat</li><li>hallucinating (seeing things or hearing voices that do not exist)</li><li>seizures</li><li>coma (loss of consciousness for a period of time)</li></ul></div></div></section><section><div id="other-information" class="section"><div class="section-header"><div class="section-title"><h2>What other information should I know?</h2></div><div class="section-button"><button type="submit" aria-controls="section-10" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-10"><p>Ask your pharmacist any questions you have about dextromethorphan.</p><p>It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.</p></div></div></section><section><div id="brand-name-1" class="section"><div class="section-header"><div class="section-title"><h2>Brand names</h2></div><div class="section-button"><button type="submit" aria-controls="section-brandname-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-brandname-1"><ul><li>Delsym 12-hour Cough</li><li>Robitussin Cough Long-Acting<sup>®</sup></li><li>Triaminic Long-Acting Cough<sup>®</sup></li><li>Vicks DayQuil Cough<sup>®</sup></li></ul></div></div></section><section><div id="brand-name-2" class="section"><div class="section-header"><div class="section-title"><h2>Brand names of combination products</h2></div><div class="section-button"><button type="submit" aria-controls="section-brand-name-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
</div></div><div class="section-body" id="section-brand-name-2"><ul><li>Alka-Seltzer Plus Cold and Cough Formula<sup>®</sup> (containing Aspirin, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Alka-Seltzer Plus Day and Night Cold Formulas<sup>®</sup> (containing Aspirin, Dextromethorphan, Phenylephrine)</li><li>Alka-Seltzer Plus Day Non-Drowsy Cold Formula<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Phenylephrine)</li><li>Alka-Seltzer Plus Flu Formula<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Alka-Seltzer Plus Mucus and Congestion<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Alka-Seltzer Plus Night Cold Formula<sup>®</sup> (containing Aspirin, Dextromethorphan, Doxylamine, Phenylephrine)</li><li>Children's Dimetapp Cold and Cough<sup>®</sup> (containing Brompheniramine, Dextromethorphan, Phenylephrine)</li><li>Children's Dimetapp Multisymptom Cold and Flu<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Children's Mucinex Cough<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Children's Mucinex Multi-Symptom Cold<sup>®</sup> (containing Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Children's Robitussin Cough and Cold CF<sup>®</sup> (containing Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Children's Robitussin Cough and Cold CF<sup>®</sup> (containing Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Children's Robitussin Cough and Cold Long-Acting<sup>®</sup> (containing Chlorpheniramine, Dextromethorphan)</li><li>Children's Sudafed PE Cold and Cough<sup>®</sup> (containing Dextromethorphan, Phenylephrine)</li><li>Coricidin HBP Chest Congestion and Cough<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Coricidin HBP Cough and Cold<sup>®</sup> (containing Chlorpheniramine, Dextromethorphan)</li><li>Coricidin HBP Day and Night Multi-Symptom Cold<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Guaifenesin)</li><li>Coricidin HBP Maximum Strength Flu<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan)</li><li>Coricidin HBP Nighttime Multi-Symptom Cold<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Doxylamine)</li><li>Diabetic Tussin DM<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Dimetane DX<sup>®</sup> (containing Brompheniramine, Dextromethorphan, Pseudoephedrine)</li><li>Mucinex Cough for Kids<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Mucinex DM<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>PediaCare Children's Cough and Congestion<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>PediaCare Children's Fever Reducer Plus Cough and Runny Nose<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan)</li><li>PediaCare Children's Fever Reducer Plus Cough and Sore Throat<sup>®</sup> (containing Acetaminophen, Dextromethorphan)</li><li>PediaCare Children's Fever Reducer Plus Flu<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>PediaCare Children's Fever Reducer Plus Multi-Symptom Cold<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Robitussin Cough and Chest DM<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Robitussin Cough and Cold CF<sup>®</sup> (containing Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Robitussin Cough and Cold Long-Acting<sup>®</sup> (containing Chlorpheniramine, Dextromethorphan)</li><li>Robitussin Night Time Cough, Cold, and Flu<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Sudafed PE Cold/Cough<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Sudafed PE Day/Night Cold<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Diphenhydramine, Guaifenesin, Phenylephrine)</li><li>Theraflu Cold and Cough<sup>®</sup> (containing Dextromethorphan, Pheniramine, Phenylephrine)</li><li>Theraflu Daytime Severe Cold and Cough<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Phenylephrine)</li><li>Theraflu Max-D Severe Cold and Flu<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine)</li><li>Triaminic Cough and Sore Throat<sup>®</sup> (containing Acetaminophen, Dextromethorphan)</li><li>Triaminic Day Time Cold and Cough<sup>®</sup> (containing Dextromethorphan, Phenylephrine)</li><li>Triaminic Multi-Symptom Fever<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan)</li><li>Tussin DM<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li><li>Tylenol Cold and Cough Daytime<sup>®</sup> (containing Acetaminophen, Dextromethorphan)</li><li>Tylenol Cold and Cough Nighttime<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Doxylamine)</li><li>Tylenol Cold and Flu Severe<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Tylenol Cold Multi-Symptom Nighttime<sup>®</sup> (containing Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylephrine)</li><li>Tylenol Cold and Mucus Severe<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine)</li><li>Vicks Children's NyQuil Cold and Cough<sup>®</sup> (containing Chlorpheniramine, Dextromethorphan)</li><li>Vicks DayQuil Cold and Flu Relief<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Phenylephrine)</li><li>Vicks DayQuil Cold and Flu Symptom Relief Plus Vitamin C<sup>®</sup> (containing Acetaminophen, Dextromethorphan, Phenylephrine)</li><li>Vicks DayQuil Mucus Control DM<sup>®</sup> (containing Dextromethorphan, Guaifenesin)</li></ul></div></div></section><section><div id="other-name" class="section"><div class="section-header"><div class="section-title"><h2>Other names</h2></div><div class="section-button"><button type="submit" aria-controls="section-other-name" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
</div></div><div class="section-body" id="section-other-name"><ul><li>DM</li></ul></div></div></section><span>Last Revised - </span><span>01/15/2022</span>
</p>
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