Corex Dx Syrup

Manufacturer: Pfizer Ltd
Medicine composition: Chlorpheniramine, Dextromethorphan
Prescription vs OTC: Prescription by Doctor not required
Last Updated: October 08, 2022

Corex Dx Syrup provides temporary relief from dry cough due to minor throat irritation. Also, it is primarily prescribed to treat cold and sneezing occurred due to seasonal allergic rhinitis or urticaria.

This medication is an antihistamine in combination with a cough suppressant that works by blocking the action of histamine in the body. It is used for relieving symptoms of sinus pressure, sinus congestion, runny nose, itching of the throat and nose, watery eyes, and sneezing due to upper respiratory infections, hay fever, and allergies.

Some adverse effects of this syrup include confusion, anxiety, restlessness, blurred vision, dry mouth, decreased coordination, and irritability. Before using this medication you should notify your doctor:

  • If you are allergic to this drug
  • If you are taking or have taken sodium oxybate, furazolidone or a monoamine oxidase inhibitor within the last 14 days
  • If you have breathing problems, glaucoma, heart problems, liver disease, high blood pressure, etc

Patients with dry cough take it to get relief. Dry cough means where no mucus or phlegm is produced while coughing. This is usually caused due to cold, flu or allergies and is usually associated with the tickly throat. Corex Dx Syrup works by suppressing the cough and hacking coughs.

Corex Dx Syrup is safe and start its activity within a few minutes and lasts about several hours. The patient must not stop this medicine unless advised by the doctors and must be taken as per the prescription-only.

This medication is primarily used for the following conditions:

  • Dry Cough

  • Common Cold Symptoms

  • Hypersensitivity

  • Narrow Angle Glaucoma

  • Peptic Ulcer

Side effects that can occur because of consuming this medication are:

  • Is It safe with alcohol?

    Consult your doctor before consuming this medication.
  • Are there any pregnancy warnings?

    No, Corex Dx Syrup is not safe for pregnant women as it can affect the foetus.

  • Are there any breast-feeding warnings?

    Breastfeeding women must consult with doctor before using this medication.
  • Is it safe to drive while on this medicine?

    As some of the side effects of this medication include drowsiness, it is not advisable to drive after taking this syrup.

  • Does this affect kidney function?

    Patients who have impaired kidney function should not take Corex Dx Syrup as it can lead to more kidney problems.

  • Does this affect liver function?

    Patients who have impaired liver function should not take Corex Dx Syrup as it can lead to more liver problems, including liver failure.

  • How long is the duration of effect?

    The duration of effect lasts for 6 hours.

  • What is the onset of action?

    The onset of action occurs anytime between 30 minutes to 1 hour after taking it.

  • Is it habit forming?

    There are no habit forming tendencies reported with this.

Below is the list of medicines, which have the same composition, strength and form as Corex Dx Syrup , and hence can be used as its substitute.

  • Are there any missed dose instructions?

    If you miss a dose, you should take one as soon as you remember that you’ve missed the dose.

  • Are there any overdose instructions?

    If you have overdosed on the medication, you must consult your doctor immediately. Certain signs of overdose include fast heartbeat, weakness, fainting and confusion.

Corex Dx Syrupis a combination medication, thus works via dual mechanism. Firstly, this drug binds to the histamine H1 receptor, which prevents the action from endogenous histamine. And secondly it works as a decongestant by suppressing the nervous system and the part of your brain which is responsible for coughing. It does not really thin the mucus, but certainly provides relief.

Whenever you take more than one medicine, or mix it with certain foods or beverages, you"re at risk of a drug interaction.

  • Interaction with Alcohol

    When taken with alcohol, this medication can increase the patients risk of developing stomach ulcers and bleeding.

  • Interaction with Disease

    It can have negative interactions with certain diseases. These include asthma, impaired kidney function, and gastrointestinal toxicity.

Ques: What is Corex dx syrup?

Ans: Corex DX syrup is medication which has Chlorpheniramine Maleate, Dextromethorphan and Menthol as active elements present in it. This syrup performs its action by reducing activity in the brain that causes coughing, obstructing H1-receptor sites on tissues; temporarily relieving minor pain. It is used to treat conditions such as hay fever, allergy, pain in arthritis, pain in tendons, etc.

Ques: What is Corex dx syrup used for?

Ans: Corex DX syrup is a medication which is used for the treatment, control, and prevention of conditions such as Dry Cough and Common Cold Symptoms.

Ques: What are the side effects of Corex dx syrup?


Corex DX syrup is a medication which has some commonly reported side effects like Headache, Dizziness, Drowsiness, Sleepiness and Stomach Upset.

Ques: Can Corex Dx Syrup be used for temporarily relief of cough caused by common cold, flu, or other conditions and common cold?

Ans: Yes, Corex Dx Syrup is a medication which can be used for temporary relief of cough caused by common cold, flu, or other conditions and common cold. Do not consume Corex DX syrup for temporary relief of cough caused by common cold, flu, or other conditions and common cold without consulting first with your doctor. It is a prescribed medication which should only be consumed on a prescription.

Ques: How long do I need to use corex dx syrup before I see improvement of my conditions?

Ans: This medication should be consumed, till the complete eradication of disease. Thus it is advised to use, till the time directed by your doctor and moreover taking this medication longer than it was prescribed, can also cause inadequate effect on the patient. So please consult your doctor.

Ques: At what frequency do I need to use corex dx syrup ?

Ans: This medication is generally used once or twice a day, as the time interval upto which this medication has an impact, is around 12 to 24 hours, but it is not the standard frequency, for using this medication. It is advised to consult your doctor for the dosage, as the frequency also depends on the patient's condition.

Ques: Should I use corex dx syrup empty stomach, before food or after food?

Ans: The action of salts involved in this medication, do not depend on using it pre-meal or post-meal. It is advised to consult a doctor before use and take it at a fixed time in a the day.

Ques: What are the instructions for storage and disposal of corex dx syrup?

Ans: This medication contains salts, which are suitable to store at room temperature and keeping this medication above or below that, can cause inadequate effect. Protect it from moisture and light. Keep this medication away, from the reach of children. It is advised to dispose the expired or unused medication, for avoiding its inadequate effect.
Disclaimer: The information produced here is best of our knowledge and experience and we have tried our best to make it as accurate and up-to-date as possible, but we would like to request that it should not be treated as a substitute for professional advice, diagnosis or treatment.

Lybrate is a medium to provide our audience with the common information on medicines and does not guarantee its accuracy or exhaustiveness. Even if there is no mention of a warning for any drug or combination, it never means that we are claiming that the drug or combination is safe for consumption without any proper consultation with an expert.

Lybrate does not take responsibility for any aspect of medicines or treatments. If you have any doubts about your medication, we strongly recommend you to see a doctor immediately.

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Content Details
Written By
PhD (Pharmacology) Pursuing, M.Pharma (Pharmacology), B.Pharma - Certificate in Nutrition and Child Care
Reviewed By
General Physician
Table of Content
About Corex Dx Syrup
What are the uses of Corex Dx Syrup
What are the contraindications of Corex Dx Syrup ?
What are the side effects of Corex Dx Syrup ?
Key highlights of Corex Dx Syrup
What are the substitutes for Corex Dx Syrup ?
What are the dosage instructions?
How does this medication work?
What are the interactions of Corex Dx Syrup ?
FAQs about Corex Dx Syrup