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Robitussin Dry Cough Medicine - 250ml

Robitussin Dry Cough Medicine - 250ml

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  • ✔️ Suppresses dry, tickly coughs with dextromethorphan hydrobromide
  • ✔️ Starts working within 15–30 minutes of taking a dose
  • ✔️ Suitable for adults and children aged 12 and over
  • ✔️ Alcohol-free formula — suitable for those avoiding alcohol
  • ✔️ 250ml bottle provides multiple doses for extended relief

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What Is Dry Cough Medicine and How Can It Help You?

 

A dry, tickly cough can be exhausting — especially when it lingers for days and disrupts your sleep. Robitussin Dry Cough Medicine 250ml is an over-the-counter oral liquid designed to relieve that persistent, unproductive cough that produces no mucus. It's one of the most widely recognised dry cough medicine options available in the UK, and it's now easy to order online from Cured Pharmacy. If you're also dealing with cold and flu symptoms alongside your cough, you might find it helpful to browse our cold and flu remedies for additional support.

Dry coughs are commonly triggered by viral upper respiratory tract infections, post-nasal drip, or irritation of the airways. According to the NHS, most coughs caused by a cold or flu will clear up on their own within three weeks, but symptomatic relief can make a real difference to your day-to-day comfort while you recover.

 

How Does Robitussin Dry Cough Medicine Work?

 

The active ingredient in Robitussin Dry Cough Medicine is dextromethorphan hydrobromide (6.5mg per 5ml). This is a centrally acting cough suppressant — meaning it works on the cough centre in the brain rather than directly on the airways.

  • Dextromethorphan acts on sigma receptors and NMDA receptors in the brainstem to raise the cough threshold.
  • It reduces the frequency and intensity of the cough reflex without suppressing normal breathing.
  • It does not treat the underlying cause of the cough — it provides symptomatic relief only.
  • It begins to take effect within 15–30 minutes of taking a dose.

Because it targets the cough reflex centrally, it's particularly suited to dry, irritating coughs rather than productive (chesty) coughs where you need to clear mucus from the airways.

 

Who Should Use Robitussin Dry Cough Medicine?

 

This product is intended for adults and children aged 12 years and over. It's suitable for those experiencing a dry, tickly, or irritating cough — particularly one associated with a cold, mild throat irritation, or post-viral airway sensitivity. It is not appropriate for productive chesty coughs where expectorating mucus is the goal.

  • Adults aged 18 and over with a dry, non-productive cough
  • Adolescents aged 12–17 years (under adult supervision)
  • People whose cough is disrupting sleep or daily activities
  • Those who have confirmed a dry cough is not related to a serious underlying condition

It is not suitable for children under 12, and those with certain health conditions should seek advice before use — see the patient information section below for full contraindications.

 

How Does Robitussin Dry Cough Compare to Other Cough Syrups?

 

Feature Robitussin Dry Cough Medicine Benylin Dry Coughs Original
Active ingredient Dextromethorphan HBr 6.5mg/5ml Dextromethorphan HBr 6.5mg/5ml
Suitable age 12 years and over 12 years and over
Volume 250ml 150ml
Contains alcohol No Yes (small amount)

 

Is Robitussin Dry Cough Medicine Safe to Store at Home?

 

Yes — this dry cough medicine is straightforward to store safely at home. Keep it below 25°C, away from direct sunlight, and always out of the reach and sight of children. Do not use the product after the expiry date printed on the bottle. Once opened, use within the period stated on the label.

If you're managing multiple symptoms at once — for example, pain alongside your cough — you may also want to explore our pain relief range for complementary options. Always check with your pharmacist before combining medicines.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Robitussin Dry Cough Medicine 250ml specifications
Treatment category Cough suppressant / Cough remedy
Mechanism of action Centrally acting cough suppressant (sigma and NMDA receptor activity)
Effective for Dry, tickly, non-productive coughs
Suitable for Adults and children aged 12 years and over
Active ingredient Dextromethorphan hydrobromide 6.5mg per 5ml
Pack size 250ml
UK classification General Sale List (GSL)
Drug class Cough suppressant (antitussive)
Preparation Oral liquid (syrup)
Route of administration Oral

Specifications of Robitussin Dry Cough Medicine 250ml

 

What Is Robitussin Dry Cough Medicine and What Is It Used For?

 

Robitussin Dry Cough Medicine 250ml is an oral liquid cough suppressant used to relieve dry, tickly, and irritating coughs in adults and adolescents aged 12 and over. It contains dextromethorphan hydrobromide as its active ingredient, which works centrally to reduce the urge to cough. It is classified as a General Sale List (GSL) medicine in the UK, meaning it can be purchased without a prescription. It is not intended to treat chesty or productive coughs where mucus needs to be cleared.

 

What Do You Need to Know Before Using Robitussin Dry Cough Medicine?

 

Before taking this medicine, read the following carefully. There are situations where this product is not appropriate, and some medicines can interact with dextromethorphan.

Do not take Robitussin Dry Cough Medicine if you:

  • Are under 12 years of age
  • Are allergic to dextromethorphan or any other ingredient in the product
  • Are currently taking or have taken monoamine oxidase inhibitors (MAOIs) within the last 14 days
  • Have a productive (chesty) cough with significant mucus
  • Have chronic bronchitis, asthma, or emphysema (unless advised by a doctor)
  • Have liver or kidney impairment (seek medical advice first)

Possible drug interactions — tell your pharmacist if you are taking:

  • Selective serotonin reuptake inhibitors (SSRIs) — risk of serotonin syndrome
  • Sedatives, sleeping tablets, or antihistamines — increased drowsiness
  • Other cough or cold medicines containing dextromethorphan — risk of overdose
  • Quinidine — may increase dextromethorphan levels in the blood

 

How Should You Use Robitussin Dry Cough Medicine?

 

Always use this medicine exactly as directed on the label or as advised by your pharmacist. Use the measuring cup or spoon provided — do not estimate doses using a household spoon, as this can lead to inaccurate dosing.

  1. Shake the bottle gently before use.
  2. Measure the correct dose using the measuring device provided.
  3. Swallow the liquid directly — do not dilute unless advised.
  4. Take up to four times daily, leaving at least four hours between doses.
  5. Do not exceed 40ml in any 24-hour period.
  6. If symptoms persist beyond 7 days, stop use and consult your pharmacist or GP.
Age Group Dose Frequency Maximum Daily Dose
Adults and children 12+ 10ml Up to 4 times daily 40ml
Children under 12 Not suitable

If you're also managing ear, nose, or throat symptoms alongside your cough, our ear, nose and throat range may offer additional relief options worth exploring.

 

What Are the Possible Side Effects of Robitussin Dry Cough Medicine?

 

Like all medicines, Robitussin Dry Cough Medicine can cause side effects, although not everyone will experience them. Most side effects are mild and resolve on their own.

Common side effects:

  • Nausea or stomach upset
  • Dizziness or light-headedness
  • Drowsiness

Less common side effects:

  • Headache
  • Constipation
  • Skin rash or itching
  • Confusion (particularly at higher doses or in elderly patients)

Stop taking this medicine and seek immediate medical attention if you experience signs of an allergic reaction, such as swelling of the face, lips, or throat, difficulty breathing, or a severe skin reaction. If you feel unusually agitated, restless, or develop a rapid heartbeat, this could indicate serotonin syndrome — stop use and seek urgent medical advice.

 

How Should You Store Robitussin Dry Cough Medicine?

 

Correct storage helps maintain the safety and effectiveness of this medicine. Follow these guidelines:

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and heat sources
  • Keep the bottle tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the label
  • Do not dispose of medicines via wastewater or household waste — return unused medicine to your pharmacist

If you're looking after your general health during cold and flu season, it's also worth considering whether your vitamin D or zinc levels are adequate. Browse our vitamins and supplements range for immune support options.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Robitussin Dry Cough Medicine online in the UK?

You can buy Robitussin Dry Cough Medicine 250ml directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for £7.69. It is available without a prescription as an over-the-counter medicine. Simply add it to your basket and it will be dispatched to your door. You can also find related products in our cold and flu collection.

How does Robitussin Dry Cough Medicine work in the body?

Robitussin Dry Cough Medicine contains dextromethorphan hydrobromide, which acts on the cough centre in the brainstem to suppress the cough reflex. It raises the threshold at which coughing is triggered, reducing the frequency and intensity of dry, tickly coughs. It does not treat the underlying cause of the cough — it provides symptomatic relief only, typically beginning to work within 15–30 minutes of taking a dose.

How do I use Robitussin Dry Cough Medicine step by step?

Shake the bottle gently before use, then measure 10ml using the measuring cup provided — never use a household spoon. Swallow the dose directly and repeat up to four times daily, leaving at least four hours between each dose. Do not exceed 40ml in 24 hours, and do not use for more than 7 days without speaking to a pharmacist or GP.

What is the correct dose of Robitussin Dry Cough Medicine for adults?

Adults and children aged 12 and over should take 10ml up to four times daily. The maximum dose in any 24-hour period is 40ml. Always leave at least four hours between doses and use the measuring device provided to ensure accuracy. Do not give this product to children under 12 years of age.

Can children under 12 take Robitussin Dry Cough Medicine?

No — Robitussin Dry Cough Medicine is not suitable for children under 12 years of age. The MHRA advises that dextromethorphan-containing products should not be used in this age group due to safety concerns. If your child has a dry cough, speak to your pharmacist or GP about age-appropriate alternatives.

What are the side effects of Robitussin Dry Cough Medicine?

Common side effects include nausea, dizziness, and drowsiness, which are generally mild and short-lived. Less commonly, you may experience headache, constipation, or a skin rash. If you develop signs of an allergic reaction — such as facial swelling, difficulty breathing, or a severe rash — stop taking the medicine immediately and seek urgent medical attention.

Can I take Robitussin Dry Cough Medicine with other medicines?

Do not take Robitussin Dry Cough Medicine if you are currently taking or have taken MAOIs within the last 14 days, as this combination can cause a dangerous reaction. Use with caution alongside SSRIs due to the risk of serotonin syndrome, and avoid combining with other sedating medicines or products also containing dextromethorphan. Always check with your pharmacist before combining any medicines.

Is Robitussin Dry Cough Medicine safe to take during pregnancy?

You should not take Robitussin Dry Cough Medicine during pregnancy without first consulting your doctor or pharmacist. Dextromethorphan should be used with caution in pregnancy, and the risks and benefits need to be assessed on an individual basis. The NHS recommends seeking medical advice before taking any over-the-counter medicine during pregnancy.

Can I take Robitussin Dry Cough Medicine while breastfeeding?

Dextromethorphan may pass into breast milk in small amounts, so it is advisable to speak to your pharmacist or GP before using this product if you are breastfeeding. They can help you weigh up the potential risks and suggest the most appropriate course of action. Do not self-medicate without professional guidance during this period.

How long can you use Robitussin Dry Cough Medicine for?

Robitussin Dry Cough Medicine should not be used for more than 7 consecutive days without consulting a doctor or pharmacist. If your cough persists beyond this period, worsens, or is accompanied by fever, breathlessness, or chest pain, you should seek medical advice promptly. Prolonged coughing can sometimes indicate an underlying condition that requires investigation.

What happens if I accidentally take too much Robitussin Dry Cough Medicine?

If you take more than the recommended dose, contact NHS 111 or go to your nearest A&E immediately — take the medicine packaging with you so healthcare professionals can see exactly what you have taken. Overdose with dextromethorphan can cause confusion, agitation, rapid heartbeat, and in severe cases, respiratory depression. Do not wait for symptoms to worsen before seeking help.

What should I do if I miss a dose of Robitussin Dry Cough Medicine?

If you miss a dose, simply take the next dose when it is due — do not double up to make up for a missed one. Robitussin Dry Cough Medicine is taken as needed for symptom relief rather than on a strict schedule, so missing a single dose is unlikely to cause any problems. Just ensure you leave at least four hours between doses.

What are the alternatives to Robitussin Dry Cough Medicine?

Other dry cough suppressants available in the UK include Benylin Dry Coughs Original and Covonia Dry Cough Sugar Free Formula, both of which also contain dextromethorphan as the active ingredient. Simple honey and lemon drinks are also recommended by the NHS as a soothing home remedy for dry coughs. For a broader range of options, browse our ear, nose and throat collection.

Does Robitussin Dry Cough Medicine contain alcohol or sugar?

Robitussin Dry Cough Medicine does not contain alcohol, which makes it a preferable choice for those who avoid alcohol for religious, medical, or personal reasons. Always check the full list of excipients on the product label or patient information leaflet if you have specific dietary requirements or known sensitivities to certain ingredients.

What are the latest studies on dextromethorphan for dry cough relief?

Dextromethorphan has been used as a cough suppressant for decades and remains one of the most studied antitussive agents available over the counter. Clinical evidence supports its effectiveness in reducing the frequency of dry, non-productive coughs in adults. The NHS and BNF continue to recognise dextromethorphan as an appropriate first-line OTC option for symptomatic dry cough relief in adults and children aged 12 and over.

How Should You Use Robitussin Dry Cough Medicine?

Robitussin Dry Cough Medicine is taken orally as a liquid. Always use the measuring cup or spoon provided with the bottle — never estimate using a household teaspoon, as this can result in an inaccurate dose. Shake the bottle gently before each use to ensure the ingredients are evenly distributed.

What Is the Correct Dose of Robitussin Dry Cough Medicine?

The dose varies by age. Do not exceed the maximum daily dose under any circumstances. If you are unsure whether this product is appropriate for you, speak to your pharmacist before use.

When Is the Best Time to Use Robitussin Dry Cough Medicine?

You can take Robitussin Dry Cough Medicine at any time of day when your cough is causing discomfort. Many people find it particularly helpful to take a dose before bed, as a dry cough can significantly disrupt sleep. Just ensure you leave at least four hours between each dose and do not take more than four doses in any 24-hour period.

Taking a dose with a small amount of water or after food may help reduce the chance of nausea, particularly if you have a sensitive stomach.

How Long Can You Use Robitussin Dry Cough Medicine For?

This medicine should not be used for more than 7 consecutive days without seeking medical advice. Most dry coughs associated with a cold or mild viral infection will begin to improve within this timeframe. If your cough persists beyond 7 days, worsens, or is accompanied by fever, chest pain, breathlessness, or blood in your sputum, stop use and consult your GP promptly.

Prolonged or recurring coughs can sometimes indicate an underlying condition such as asthma, acid reflux, or a chest infection, all of which require proper medical assessment and treatment.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

How Should You Use Robitussin Dry Cough Medicine?

Robitussin Dry Cough Medicine is taken orally as a liquid. Always use the measuring cup or spoon provided with the bottle — never estimate using a household teaspoon, as this can result in an inaccurate dose. Shake the bottle gently before each use to ensure the ingredients are evenly distributed.

What Is the Correct Dose of Robitussin Dry Cough Medicine?

The dose varies by age. Do not exceed the maximum daily dose under any circumstances. If you are unsure whether this product is appropriate for you, speak to your pharmacist before use.

When Is the Best Time to Use Robitussin Dry Cough Medicine?

You can take Robitussin Dry Cough Medicine at any time of day when your cough is causing discomfort. Many people find it particularly helpful to take a dose before bed, as a dry cough can significantly disrupt sleep. Just ensure you leave at least four hours between each dose and do not take more than four doses in any 24-hour period.

Taking a dose with a small amount of water or after food may help reduce the chance of nausea, particularly if you have a sensitive stomach.

How Long Can You Use Robitussin Dry Cough Medicine For?

This medicine should not be used for more than 7 consecutive days without seeking medical advice. Most dry coughs associated with a cold or mild viral infection will begin to improve within this timeframe. If your cough persists beyond 7 days, worsens, or is accompanied by fever, chest pain, breathlessness, or blood in your sputum, stop use and consult your GP promptly.

Prolonged or recurring coughs can sometimes indicate an underlying condition such as asthma, acid reflux, or a chest infection, all of which require proper medical assessment and treatment.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of Robitussin Dry Cough Medicine?

Most people tolerate Robitussin Dry Cough Medicine well when taken at the recommended dose. However, as with any medicine, side effects can occur. The most commonly reported ones are generally mild and tend to resolve without any specific treatment.

  • Nausea or stomach discomfort
  • Dizziness or light-headedness
  • Drowsiness or sedation

What Are the Less Common Side Effects of Robitussin Dry Cough Medicine?

Some people may experience side effects that are less frequent but still worth being aware of. If any of the following persist or become bothersome, speak to your pharmacist.

  • Headache
  • Constipation
  • Skin rash or itching
  • Dry mouth
  • Confusion or disorientation (more likely at higher doses or in older adults)

What Are the Serious Side Effects of Robitussin Dry Cough Medicine?

Serious side effects are rare but require immediate medical attention. Stop taking this medicine straight away and seek urgent help if you experience any of the following:

  • Signs of an allergic reaction: swelling of the face, lips, tongue, or throat; difficulty breathing; severe skin rash or hives
  • Signs of serotonin syndrome (particularly if taken with SSRIs): agitation, rapid heartbeat, high temperature, muscle twitching, or confusion
  • Difficulty breathing or worsening respiratory symptoms

Serotonin syndrome is a potentially life-threatening condition. If you are taking antidepressants and develop any of the above symptoms after taking this medicine, call 999 or go to A&E immediately.

What Should You Do If You Experience Side Effects of Robitussin Dry Cough Medicine?

For mild side effects such as nausea or dizziness, try taking the medicine with a small amount of food or water. Avoid driving or operating machinery if you feel drowsy. If side effects are persistent, unexpected, or concerning, stop use and speak to your pharmacist or GP. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Robitussin Dry Cough Medicine Interact With Other Medicines?

Yes — dextromethorphan can interact with several medicines. The most clinically significant interaction is with MAOIs, which can cause a severe and potentially fatal reaction. Do not take this product within 14 days of stopping an MAOI. Combining dextromethorphan with SSRIs or SNRIs increases the risk of serotonin syndrome. Taking it alongside sedatives, antihistamines, or sleeping tablets may increase drowsiness. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are taking before starting this product.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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