Dextromethorphan Dosage: Forms, Strengths, and More
Dextromethorphan is a generic over-the-counter (OTC) drug used to relieve cough. The drug comes as an oral suspension and an oral liquid capsule. How often you take it depends on the form you take.
Dextromethorphan is used in adults and certain children to relieve dry cough from minor throat or airway irritation, such as from a cold.
Dextromethorphan belongs to a group of drugs called cough suppressants.
This article describes the dosages of dextromethorphan, as well as its strengths and how to take it. To learn more about dextromethorphan, see this in-depth article.
What is dextromethorphan’s dosage?
This section describes the usual dosages of dextromethorphan. See below for details.
What are dextromethorphan’s forms?
Dextromethorphan is available as:
Note: “Extended release” means the drug is released into your body slowly over a long period of time.
What strengths does dextromethorphan come in?
Dextromethorphan comes in two strengths:
What are the usual dosages of dextromethorphan?
The information below describes commonly recommended dosages of dextromethorphan, which is an OTC medication. Be sure to follow the package directions when taking dextromethorphan. You can also ask your doctor or pharmacist about the dosage that’s right for you.
Dosage for cough
The typical dextromethorphan dose for adults with dry cough depends on the form you’re taking.
If you have questions about your dextromethorphan dosage, talk with your pharmacist.
What’s the dextromethorphan dosage for children?
Dextromethorphan is used to help relieve cough in certain children caused by minor throat or airway irritation, such as from a cold. The dosage used in children is based on the form they take and their age.
Oral liquid capsules: The oral capsules are approved for use in children ages 12 years and older. The dosage is the same as the adult dosage, that is, two capsules taken every 6 to 8 hours as needed, with a maximum dosage of eight capsules in 24 hours.
Oral suspension: The oral suspension is approved for use in children ages 4 years and older. The dosage is based on the child’s age. See the table below for details.
| Age | Dosage | Frequency |
|---|---|---|
| children ages 12 years and older | 10 mL | every 12 hours; max dose of 20 mL in 24 hours |
| children ages 6 years to younger than 12 years | 5 mL | every 12 hours; max dose of 10 mL in 24 hours |
| children ages 4 years to younger than 6 years | 2.5 mL | every 12 hours; max dose of 5 mL in 24 hours |
| children younger than ages 4 years | not recommended | not applicable |
For more information about dextromethorphan’s dosage for children, talk with your child’s doctor or a pharmacist.
How to take dextromethorphan
How you take dextromethorphan depends on the form you take. Follow the package directions for the form of dextromethorphan you’ve purchased. You can also talk with your pharmacist if you have questions about how to take the drug.
For the oral liquid capsules, swallow them whole. You should not crush, cut, or chew the capsules. If you have difficulty swallowing pills, you can see this article for tips on how to take this form. You can also consider buying the oral liquid suspension form.
For the oral suspension form, you can measure out the correct dose using a teaspoon. (One teaspoon equals 5 mL). Or if giving the drug to a young child, you can use an oral syringe to measure the correct dose.
With either form, you can take the drug with or without food.
Is dextromethorphan used long term?
No. Dextromethorphan is used as a short-term treatment to relieve minor cough from throat or airway irritation.
If you have questions about how long you can take dextromethorphan to relieve cough, talk with your pharmacist or doctor.
What should be done in case of overdose?
Do not take more dextromethorphan than what’s recommended on the product label. Taking too much dextromethorphan (a toxic dose) can lead to harmful effects.
Symptoms of overdose
Symptoms caused by an overdose can include:
In severe cases, dextromethorphan overdose can lead to coma or even death if not treated.
What to do in case you take too much dextromethorphan
Call your doctor right away if you think you’ve taken too much dextromethorphan. You can also call 800-222-1222 to reach America’s Poison Centers or use its online resource. But if you have severe symptoms, immediately call 911 (or your local emergency number) or go to the nearest emergency room.
FAQ for Dextromethorphan Dosage: Forms, Strengths, and More
What is Dextromethorphan used for?
Dextromethorphan is a medication commonly used as a cough suppressant. It helps to relieve coughs caused by the common cold, the flu, and other respiratory illnesses. It works by decreasing the activity in the part of the brain that causes coughing.
What forms does Dextromethorphan come in?
Dextromethorphan is available in several forms, including:
This variety allows users to choose a form that best suits their preferences or needs.
What are the common strengths of Dextromethorphan?
Dextromethorphan is available in various strengths, commonly ranging from 10 mg to 30 mg per dose in liquid form, with capsules and tablets typically available in similar strengths. It’s important to follow the dosing instructions specific to the product you are using.
How should I take Dextromethorphan?
Dosing instructions vary depending on the form and strength of the Dextromethorphan product you are using. Generally, it is recommended to take it as needed for cough, according to the guidelines on the product label or as prescribed by a healthcare provider. Always use the measuring device provided in the package for liquid forms to ensure the correct dosage.
Can children take Dextromethorphan?
Dextromethorphan should only be given to children as directed by a healthcare provider. The dosage may differ based on the child’s age and weight, and some forms or strengths may not be appropriate for young children. Always consult with a pediatrician before administering Dextromethorphan to a child.
What are the possible side effects of Dextromethorphan?
While generally safe when used as directed, Dextromethorphan can cause side effects in some individuals. Common side effects include dizziness, drowsiness, nausea, and upset stomach. If you experience severe side effects or signs of an allergic reaction, seek medical attention promptly.
Can I take Dextromethorphan with other medications?
Dextromethorphan can interact with other medications, especially MAO inhibitors, certain antidepressants, and other substances that depress the nervous system. It is crucial to check with a healthcare provider or pharmacist before combining Dextromethorphan with other medications.
What should I do if I miss a dose?
Since Dextromethorphan is typically taken as needed for cough relief, missing a dose is not usually an issue. Take it when you remember, following the recommended dosing schedule. Do not double up on doses to make up for a missed one.
Are there any precautions I should take when using Dextromethorphan?
When taking Dextromethorphan, avoid using it in conjunction with alcohol or other medications that can cause drowsiness. It is also advisable not to drive or operate machinery if you feel drowsy or dizzy after taking the medication. Pregnant or breastfeeding individuals should consult with a healthcare provider before use.
What should I do in case of an overdose?
In the event of an overdose, seek medical attention immediately. Symptoms of overdose may include confusion, hallucinations, slow breathing, and loss of consciousness. It is important to use Dextromethorphan only as directed to prevent overdose.
Where should I store Dextromethorphan?
Store Dextromethorphan in a cool, dry place away from direct sunlight and out of the reach of children and pets. Ensure the lid is tightly closed after each use to maintain the integrity of the medication. Follow any additional storage instructions on the package.
Disclaimer: adoctor has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.
Thanks for sharing this comprehensive guide on dextromethorphan dosage! It’s really helpful to have all the information about forms and strengths in one place. Understanding the right dosage is crucial for safety and effectiveness, especially when managing cough symptoms. Keep up the great work!
This article is incredibly informative! It’s so important to understand the different forms and strengths of dextromethorphan to ensure safe and effective use. I appreciate the detailed breakdown and tips on what to look out for when choosing an over-the-counter option. Thanks for shedding light on this topic!