Dextromethorphan+Chlorpheniramine / Chlorphenamine
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Molecule Summary
| Uses | Common cold and cough |
| Therapy | Cough Cold Preparation |
| Side Effects | Drowsiness, dizziness, upset stomach |
Assurance
available
Regulated
Molecule Description
Dextromethorphan+Chlorpheniramine / Chlorphenamine is a combination medication used to relieve cold symptoms, including cough, sneezing, and a runny nose. It contains chlorpheniramine, an antihistamine, and dextromethorphan, a cough suppressant. Chlorpheniramine works by blocking the receptors to which histamine binds, thereby preventing or reducing the allergic response. Cough is produced when the cough center in the brain is activated.
Dextromethorphan acts as a cough suppressant by directly affecting these specific areas in the brain, essentially deactivating the cough reflex and providing relief from coughing. Chlorpheniramine tackles allergic symptoms at the source by blocking histamine, while dextromethorphan works on the central nervous system to suppress the cough reflex.
This medicine should be taken exactly as prescribed by your doctor. Common side effects include nausea, upset stomach, and rash. These side effects are usually temporary, but contact your doctor if they persist or worsen. Dextromethorphan+Chlorpheniramine / Chlorphenamine may cause dizziness and drowsiness, so avoid driving or engaging in activities that require mental focus. Avoid alcohol consumption while taking this medication. Dextromethorphan+Chlorpheniramine / Chlorphenamine should not be used in children below 2 years of age.
According to the advisory issued by the Union Health Ministry, cough and cold medications should not be prescribed or dispensed to children under two years of age. These medications are generally not recommended for children under five years old. For children above that age, any use should be based on careful clinical evaluation and close supervision.
Uses
Dextromethorphan+Chlorpheniramine / Chlorphenamine gives short-term relief from sneezing, cough, or runny nose due to minor throat and airway irritation which occurs during common cold and other respiratory allergies.
Contraindications
When should one not use Dextromethorphan+Chlorpheniramine / Chlorphenamine
- In case you are allergic to chlorpheniramine, dextromethorphan or any other components of this medicine.
- If you are having or had medicines like sodium oxybate (used to prevent day time sleepiness)
- If you are taking or have taken monoamine oxidase inhibitors such as phenelzine, selegiline (used to treat mental illness or Parkinson's disease) at least two weeks before starting treatment with this medicine. In case you don't know whether your prescription includes such medicines, ask your doctor before taking Dextromethorphan+Chlorpheniramine / Chlorphenamine.
Side effects
Common side effects of this drug are:
- Drowsiness
- Sleepiness
- Dizziness
- Tiredness
- Upset stomach
- Headache
- Nausea
- Vomiting
Precautions and Warnings
Pregnancy
Breast Feeding
Driving
Alcohol
Other General Warnings
Talk to your doctor if
- You have a cough for a long time with a lot of mucus (like asthma, emphysema or smoking).
- You have eye problems like glaucoma (increased pressure in the eye).
- You have difficulty in urination and a frequent urge to urinate (enlarged prostate).
- You have problems with your heart and liver.
- You have any breathing problems, high blood pressure and fits.
- In young children, this medicine may produce excitement instead of drowsiness. Be cautious while giving this medicine to children.
- Older people should be cautious while using Dextromethorphan+Chlorpheniramine / Chlorphenamine, as they are more prone to develop dizziness and urination difficulties with this medicine.
- It is not recommended to use this medicine in children below 2 years of age.
Mode of Action
How Does It Work?
- Natural substances like Histamine released in our body are responsible for allergies such as sneezing or runny nose
- Chlorpheniramine blocks the effect of these substances and provides relief in symptoms of a common cold
- There are specific areas in the brain (cough centre) which when activated produces coughing
- Dextromethorphan affects these areas and deactivates them, thus helps in relieving the coughing
Interactions
Interactions with other medicines
- Dextromethorphan+Chlorpheniramine / Chlorphenamine should not be taken with a medicine called monoamine oxidase inhibitors (MAOIs) because it produces a condition called serotonin syndrome which is a life-threatening condition that can occur rapidly due to a build-up of an excessive amount of serotonin in the body.
- In the case of serotonin syndrome, a person may experience high body temperature, high blood pressure, fast heart rate, excitability, tremor (shakiness), and sweating. In such a situation patients should rush to a nearby hospital.
- Dextromethorphan+Chlorpheniramine / Chlorphenamine should be used cautiously with other medicines like Codeine, Hydrocodone (used for cough) that cause drowsiness. Alcohol, Marijuana, medicines to treat mental illness (Alprazolam, Lorazepam, Zolpidem, etc.), muscle-relaxing medicines ( Carisoprodol, Cyclobenzaprine), other antihistaminic medicines (Cetirizine, Diphenhydramine, etc.) should be consumed with caution.
Interactions with food items
Dextromethorphan+Chlorpheniramine / Chlorphenamine is taken with or without food in a dose and duration as advised by the doctor. Do not consume grapefruit juice or any other products which might have grapefruit juice.
Dosage
Overdose
Overdose of Dextromethorphan+Chlorpheniramine / Chlorphenamine may cause severe drowsiness, dizziness, fast or irregular heartbeats, confusion, hallucination, nervousness, seizures, fits and difficulty in releasing urine. If you experience any of the symptoms or think you have taken an excessive quantity of this medicine, contact your doctor immediately or visit the nearest hospital.
Missed a Dose
Missing a dose of Dextromethorphan+Chlorpheniramine / Chlorphenamine may reduce the effectiveness of the treatment. If you missed any dose of medicine, take it as soon as you remember. If it's time for your next dose, skip the missed dose and continue with your regular dose schedule. Do not take a double dose of medicine to compensate for the missed one.
Frequently Asked Questions (FAQs)
Articles
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References:
- Chlorpheniramine: MedlinePlus Drug Information [Internet]. Medlineplus.gov. 2025 [cited 9th June 2026]
- Dextromethorphan: MedlinePlus Drug Information [Internet]. Medlineplus.gov. 2025 [cited 9th June 2026]
- Oh SR, Agrawal S, Sabir S, et al. Dextromethorphan. [Updated 2023 May 22]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. 2025 [cited 9th June 2026]
- National Center for Biotechnology Information (2024). PubChem Compound Summary for CID 2725, Chlorpheniramine. 2025 [cited 9th June 2026]
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