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Benylin Mucus Cough Max Menthol - 150ml

Benylin Mucus Cough Max Menthol - 150ml

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  • ✔️ Loosens and clears chest mucus with guaifenesin expectorant
  • ✔️ Menthol soothes irritated throat with cooling sensation
  • ✔️ Suitable for adults and young people aged 12 and over
  • ✔️ Non-drowsy formula — safe for daytime use
  • ✔️ Targets chesty productive coughs, not dry tickly coughs

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What Is Benylin Mucus Cough Max Menthol?

 

If you've been dealing with a chesty cough that just won't shift, you'll know how exhausting it can be. Benylin mucus cough Max Menthol 150ml is an over-the-counter expectorant syrup designed to help loosen and clear the thick mucus that builds up in your airways during a cold or chest infection. Each 10ml dose contains 200mg of guaifenesin — a well-established expectorant used widely in the UK. The added menthol gives a cooling, soothing sensation as you swallow, which many people find genuinely comforting when their throat feels raw and irritated. You can browse our full range of cold and flu remedies if you need additional support alongside this product.

Chesty coughs are one of the most common reasons people visit a pharmacist in the UK. They typically occur when the airways produce excess mucus in response to infection or irritation, triggering the cough reflex as your body tries to clear it. This product is specifically formulated to target that mucus directly, rather than simply suppressing the cough.

 

How Does Benylin Mucus Cough Max Menthol Work?

 

The active ingredient, guaifenesin, works as an expectorant. Here's what that means in practice:

  • It increases the volume of secretions in the respiratory tract
  • It reduces the viscosity (stickiness) of mucus, making it thinner and easier to move
  • This allows the tiny hair-like cilia lining your airways to sweep mucus upward more effectively
  • The result is a more productive cough — one that actually clears mucus rather than just irritating your throat

Menthol, the secondary ingredient, acts on cold receptors in the mouth and throat, creating a sensation of coolness and airflow. It doesn't physically open your airways, but it can make breathing feel more comfortable — which matters when you're feeling rough.

 

Who Should Use Benylin Mucus Cough Max Menthol?

 

This product is suitable for adults and young people aged 12 and over who are experiencing a chesty, productive cough with mucus. It's particularly useful when:

  • Your cough feels tight and congested rather than dry and tickly
  • You're producing phlegm but struggling to clear it
  • You have a cold or upper respiratory tract infection causing chest congestion
  • You want a non-drowsy option that won't interfere with your daily routine

It is not intended for dry, tickly coughs. If you're unsure which type of cough you have, a pharmacist can help you choose the right product.

 

How Does Benylin Mucus Cough Max Compare to Other Cough Syrups?

 

Feature Benylin Mucus Cough Max Menthol Benylin Dry Coughs Original
Active ingredient Guaifenesin 200mg/10ml Dextromethorphan 6.5mg/5ml
Cough type Chesty / productive cough Dry / tickly cough
Mechanism Expectorant — loosens mucus Cough suppressant — reduces urge to cough
Menthol added Yes No

 

Is Benylin Mucus Cough Max Menthol Suitable for Everyone?

 

Not quite. While Benylin mucus cough Max Menthol is widely suitable for adults and those aged 12 and over, there are some important considerations. It should not be used by children under 12. If you have liver or kidney problems, are pregnant, or are breastfeeding, speak to your doctor or pharmacist before use. People with phenylketonuria should also check the inactive ingredients carefully. If your symptoms include a high fever, shortness of breath, or blood in your phlegm, do not self-treat — seek medical attention promptly. For general wellbeing support during illness, you might also consider our vitamins and supplements range to support your immune system.

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.

Benylin Mucus Cough Max Menthol 150ml specifications
Treatment category Cough remedies / Cold and flu
Mechanism of action Expectorant — increases and thins respiratory secretions
Effective for Chesty, productive coughs with mucus
Suitable for Adults and children aged 12 and over
Active ingredient Guaifenesin 200mg per 10ml
Pack size 150ml
UK classification General Sale List (GSL)
Drug class Expectorant
Preparation Oral syrup
Route of administration Oral

Specifications of Benylin Mucus Cough Max Menthol 150ml

 

What Is Benylin Mucus Cough Max Menthol and What Is It Used For?

 

Benylin Mucus Cough Max Menthol 150ml is an oral expectorant syrup used to relieve chesty coughs associated with colds, flu, and minor upper respiratory tract infections. Its active ingredient, guaifenesin, helps to thin and loosen mucus in the airways so it can be cleared more easily. The menthol flavouring provides a cooling sensation that many people find soothing on an irritated throat. This is an over-the-counter (OTC) medicine available without a prescription for adults and young people aged 12 and over.

 

What Do You Need to Know Before Using Benylin Mucus Cough Max Menthol?

 

Before taking this medicine, read the following carefully. Some people should not use this product or should seek advice first.

Do not use if you:

  • Are under 12 years of age
  • Are allergic to guaifenesin or any other ingredient in the product
  • Have a persistent or chronic cough associated with asthma, emphysema, or smoking
  • Have a cough producing large amounts of phlegm without a clear cause

Speak to your doctor or pharmacist before use if you:

  • Are pregnant or breastfeeding
  • Have liver or kidney impairment
  • Have phenylketonuria (check inactive ingredients)
  • Are taking any other medicines, including herbal remedies

Drug interactions to be aware of:

  • No clinically significant interactions are known at standard OTC doses of guaifenesin
  • Always inform your pharmacist of all medicines you are currently taking
  • Avoid combining with other cough and cold products that may contain similar ingredients

 

How Should You Use Benylin Mucus Cough Max Menthol?

 

Always use this medicine exactly as described in the patient information leaflet or as directed by your pharmacist. Do not exceed the stated dose.

  1. Shake the bottle gently before each use
  2. Measure 10ml using the measuring cup or spoon provided — do not estimate
  3. Swallow the syrup directly; do not dilute
  4. Take up to four times a day, leaving at least four hours between doses
  5. Do not take more than four doses (40ml) in any 24-hour period
Age Group Dose Frequency Maximum daily dose
Adults and children 12+ 10ml Up to 4 times daily 40ml (4 doses)
Children under 12 Not suitable — do not use

If you are managing other symptoms alongside your cough — such as sinus pain or a sore throat — our ear, nose and throat range includes additional products that may help.

 

What Are the Possible Side Effects of Benylin Mucus Cough Max Menthol?

 

Like all medicines, this product can cause side effects, although not everyone experiences them. Most side effects are mild and resolve on their own.

Common side effects:

  • Nausea
  • Stomach discomfort
  • Vomiting (particularly if taken on an empty stomach)

Less common side effects:

  • Dizziness or headache
  • Drowsiness
  • Skin rash or allergic reaction (stop use immediately if this occurs)

If you experience any serious allergic reaction — including swelling of the face, lips, or throat, or difficulty breathing — stop taking the medicine and seek emergency medical help immediately. If your cough does not improve after 7 days, or if it worsens, consult your GP. You can also find support for related symptoms through our pain relief range if you're experiencing associated headaches or body aches.

 

How Should You Store Benylin Mucus Cough Max Menthol?

 

  • Store below 25°C in a cool, dry place
  • Do not refrigerate or freeze
  • 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 bottle or carton
  • Do not dispose of medicines via wastewater or household waste — return unused medicine to your pharmacist

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 Benylin Mucus Cough Max Menthol online in the UK?

You can buy Benylin Mucus Cough Max Menthol 150ml directly from Cured Pharmacy for just £5.99 — no prescription needed. It's a General Sale List medicine, so it's available over the counter. Browse our full cold and flu range for complementary products to help you recover faster.

How does Benylin Mucus Cough Max Menthol work in the body?

The active ingredient guaifenesin works as an expectorant, increasing the volume of mucus secretions in your airways while reducing their stickiness. This makes it easier for your body to cough up and clear the mucus naturally. The menthol adds a cooling sensation that can make breathing feel more comfortable while your body does the work.

How do I use Benylin Mucus Cough Max Menthol step by step?

Shake the bottle, then measure exactly 10ml using the measuring cup provided — never estimate. Swallow the syrup directly without diluting it, and wait at least four hours before taking your next dose. You can take up to four doses in 24 hours, but do not exceed this amount.

What is the correct dose of Benylin Mucus Cough Max Menthol for adults?

Adults and young people aged 12 and over should take 10ml up to four times daily, with at least four hours between each dose. The maximum dose in any 24-hour period is 40ml (four doses). Do not take more than this, even if your symptoms feel severe.

Can children under 12 take Benylin Mucus Cough Max Menthol?

No — this product is not suitable for children under 12 years of age. If your child has a chesty cough, speak to a pharmacist who can recommend an age-appropriate alternative. Our baby and toddler range includes products designed specifically for younger children.

What are the side effects of Benylin Mucus Cough Max Menthol?

Side effects are uncommon but can include nausea, stomach discomfort, dizziness, or headache — particularly if taken on an empty stomach. Rarely, some people may experience a skin rash or allergic reaction. If you notice swelling of the face or throat, or have difficulty breathing, stop use immediately and seek emergency help.

How do I manage side effects of Benylin Mucus Cough Max Menthol?

Taking the syrup with or after food can help reduce the likelihood of nausea or stomach upset. If you feel dizzy, sit or lie down until the feeling passes and avoid driving. For mild headaches, a standard paracetamol or ibuprofen from our pain relief range may help, but always check for interactions first.

Who is eligible to use Benylin Mucus Cough Max Menthol?

This product is suitable for adults and young people aged 12 and over with a chesty, productive cough. It is not suitable for children under 12, or for people with chronic respiratory conditions such as asthma or emphysema without medical advice. Pregnant or breastfeeding women should consult their doctor or pharmacist before use.

What happens if I miss a dose of Benylin Mucus Cough Max Menthol?

Simply take your next dose when needed, as long as at least four hours have passed since your last dose. Do not double up to make up for a missed dose. This is a symptom-relief medicine, so there is no clinical risk from missing a single dose.

How long can you use Benylin Mucus Cough Max Menthol for?

You should not use this product for more than 7 consecutive days without consulting a doctor or pharmacist. If your cough persists beyond a week, worsens, or is accompanied by a high fever or blood in your phlegm, seek medical advice promptly. Prolonged coughs can sometimes indicate an underlying condition that needs investigation.

Can I take Benylin Mucus Cough Max Menthol if I am pregnant?

You should speak to your doctor or pharmacist before taking this medicine during pregnancy or while breastfeeding. Guaifenesin has not been fully evaluated in clinical studies involving pregnant women, so caution is advised. Your healthcare provider can help you weigh up the risks and benefits for your individual situation.

What is the difference between Benylin Mucus Cough Max and standard Benylin cough syrup?

Benylin Mucus Cough Max contains guaifenesin at 200mg per 10ml, which is a higher concentration than some standard Benylin formulations. It also includes menthol for a cooling, soothing effect. Standard Benylin products vary in their active ingredients — some contain dextromethorphan for dry coughs, so it's important to choose the right one for your cough type.

What are the alternatives to Benylin Mucus Cough Max Menthol?

Alternatives for chesty coughs include other guaifenesin-based syrups such as Robitussin Chesty Cough, or simple glycerol-based linctuses available from your pharmacist. The right choice depends on your symptoms, age, and any other medicines you're taking. A pharmacist can help you compare options from our ear, nose and throat range.

Can I take Benylin Mucus Cough Max Menthol with other cold and flu medicines?

Be cautious about combining this with other cough and cold products, as some multi-symptom remedies already contain guaifenesin — taking both could lead to an unintentional overdose of the same ingredient. Always check the ingredients of any other cold medicine you're using and ask your pharmacist if you're unsure. No significant drug interactions are known at standard OTC doses.

What does the latest research say about guaifenesin for chesty coughs?

Guaifenesin has been used as an expectorant for decades and remains one of the most widely studied OTC cough ingredients. Evidence supports its role in reducing mucus viscosity and improving mucociliary clearance, though clinical trial data on subjective symptom relief is mixed. The NHS and BNF continue to recognise it as an appropriate OTC option for productive coughs in adults.

How Should You Use Benylin Mucus Cough Max Menthol?

Using this medicine correctly makes a real difference to how well it works. Always read the patient information leaflet before starting, and follow these steps each time you take a dose.

Taking the syrup with a small amount of food or after a meal can help reduce the chance of stomach discomfort, particularly if you have a sensitive stomach.

What Is the Correct Dose of Benylin Mucus Cough Max Menthol?

The dose depends on your age. This product is only suitable for adults and young people aged 12 and over. Do not give it to children under 12 under any circumstances.

The maximum amount you should take in any 24-hour period is 40ml (four doses of 10ml). Never exceed this, even if your symptoms feel particularly severe.

When Is the Best Time to Use Benylin Mucus Cough Max Menthol?

There is no single "best" time of day — you can take doses as needed throughout the day, spacing them at least four hours apart. Many people find it helpful to take a dose in the morning to help clear overnight mucus build-up, and again in the evening before bed to reduce coughing that might disturb sleep. If you're taking four doses a day, spreading them evenly across waking hours works well — for example, at breakfast, midday, late afternoon, and before bed.

Drinking plenty of fluids throughout the day can also support the expectorant action of guaifenesin, helping to keep mucus thin and easier to clear.

How Long Can You Use Benylin Mucus Cough Max Menthol For?

This product is intended for short-term use only. Do not use it for more than 7 consecutive days without speaking to a doctor or pharmacist. Most chesty coughs associated with a cold or minor respiratory infection will begin to improve within this timeframe. If your cough persists beyond 7 days, worsens significantly, or is accompanied by a high fever, chest pain, or blood in your phlegm, stop using the product and seek medical advice promptly — these symptoms may indicate a more serious condition requiring treatment.

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

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What Are the Most Common Side Effects of Benylin Mucus Cough Max Menthol?

Most people who use Benylin Mucus Cough Max Menthol do not experience side effects. When they do occur, they are usually mild and short-lived. Taking the syrup with food can help reduce the likelihood of gastrointestinal symptoms.

  • Nausea
  • Vomiting
  • Stomach discomfort or upset

What Are the Less Common Side Effects of Benylin Mucus Cough Max Menthol?

A smaller number of people may experience the following side effects. These are not dangerous in most cases, but you should stop use and seek advice if they persist or feel severe.

  • Headache
  • Dizziness
  • Drowsiness
  • Skin rash or itching

What Are the Serious Side Effects of Benylin Mucus Cough Max Menthol?

Serious side effects are rare but can occur. The most significant risk is an allergic reaction (hypersensitivity) to guaifenesin or another ingredient in the product. Signs of a serious allergic reaction include swelling of the face, lips, tongue, or throat, difficulty breathing or swallowing, a sudden widespread skin rash, or a rapid heartbeat. If you experience any of these symptoms, stop taking the medicine immediately and call 999 or go to your nearest A&E department. Do not attempt to drive yourself.

What Should You Do If You Experience Side Effects of Benylin Mucus Cough Max Menthol?

For mild side effects such as nausea or headache, try taking the next dose with food and ensure you are drinking enough water throughout the day. If dizziness occurs, sit or lie down until it passes and avoid operating machinery or driving. If any side effect concerns you, does not resolve, or worsens over time, contact your pharmacist or GP for guidance. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Benylin Mucus Cough Max Menthol Interact With Other Medicines?

No clinically significant drug interactions have been identified for guaifenesin at standard over-the-counter doses. However, you should always tell your pharmacist about every medicine you are currently taking — including prescription medicines, other OTC products, and herbal remedies. Be particularly careful not to combine this product with other cough and cold medicines that may already contain guaifenesin, as this could result in taking more than the recommended daily amount without realising it. If you are unsure whether a combination is safe, ask your pharmacist before taking both products together.

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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