Benylin Mucus Cough Relief Night Syrup – 150ml

Based on 7 reviews
In stock
Paul Kelly - Medical Content Writer
Paul Kelly
James O'Loan - CEO & Superintendent Pharmacist
James O'Loan
CEO & Superintendent Pharmacist
How we ensure accuracy in our content

What is Benylin Mucus Cough Relief Night Syrup?

This Benylin syrup is a treatment that works to relieve the effects of a mucus cough and its effects at night time. The liquid contains three active ingredients that help to relieve the effects of a mucus cough:

  • Diphenhydramine
  • Guaifenesin
  • Levomenthol

Diphenhydramine is an antihistamine that helps to reduce coughing, and also helps you to sleep. Guaifenesin is an expectorant that loosens phlegm and mucus from the lungs which make it easier to cough up. Levomenthol helps to make breathing easier by relieving a congested nose.


What caused a mucus cough?

A mucus cough is caused by mucus and phlegm becoming clogged up in the airways and lungs, this makes breathing difficult and as a result, a cough starts occurring. A cough is the body’s way of trying to remove the trapped mucus and phlegm. The main cause of mucus build-up is an infection, such as a cold or the flu.


Who is this Benylin medicine suitable for?

Benylin Mucus Cough Relief Night Syrup is suitable for adults and children aged 12 and over. It should not be used by anyone who is allergic to any of the ingredients contained in the syrup. It should also not be used by anyone who has taking or is currently antidepressants known as Monoamine Oxidase Inhibitors (MAOIs). If you are taking any medication for another condition, then it is recommended that you speak to a doctor or Chemist 4 U pharmacist before using this syrup.


Can someone who is pregnant or breastfeeding use this cough medicine?

Anyone who is pregnant or breastfeeding should speak to a doctor or Chemist 4 U before using this medicine.


How should Benylin Mucus Cough Relief Night Syrup be used?

Take 10ml (two 5ml spoonfuls) before bedtime and then another 10ml dosage every six hours as needed, or take 10ml four times a day. Do not take more than four doses a day.


Are there any side effects?

Like with many different medicines, there is a chance of side effects. Potential side effects include:

  • Skin Rashes
  • Swelling of the face, lips, tongue, or throat
  • Increased awareness of heart palpitations
  • Shakiness
  • Difficulty passing urine
  • Drowsiness
  • Dizziness
  • Upset stomach
  • Nausea or vomiting

If you notice any side effect, then stop using and speak to a doctor or Chemist 4 U pharmacist as soon as possible. You can also record any side effect using the MHRA Yellow Card Scheme.


Why do I need to answer questions to buy this product?

You do not need a prescription for Benylin Mucus Cough Relief Night Syrup, however, you will be asked to complete a short medical questionnaire by your Chemist 4 U pharmacist before we can take your order. This includes some simple questions that all pharmacies legally are required to ask before supplying this kind of product. This helps our pharmacy team to be sure that Benylin is the best choice for you.


More Information

This product is a medicine; make sure to speak to your doctor or Chemist 4 U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here.

If you are concerned about addiction to 'over the counter' medication, we urge you to visit the below links for professional help and advice:

Drug Data
Product Type
Brand Information
Brand Name
Product Data
Days Supply

Ask a Pharmacist

Didn't find the answer you were looking for? Submit a private question to be answered by one of our qualified UK pharmacists.

* Name and email address are only captured so you can be emailed a response when your question is answered by a pharmacist. No personally identifiable information is stored or displayed at any time.

Shipping Times

MethodHandling TimeTransit TimeTimescaleApprox Cost
Standard Shipping (3-5 Working Days)123£2.95
Royal Mail Tracked 24011£4.95
Next Day Guaranteed (1 Working Day)n/an/an/a£6.95

Times are given in working days and are approximate. Costs may change based on order total, day of the week or location within the UK. Ability to hit timescales will depend on whether the products are ordered before a cut off time, as well as additional administration time incurred in reviewing your order.

Please review the estimates at the checkout.

Shipping Costs

Free UK Delivery on all orders over £30* - Delivery within 3-5 working days.

Standard UK Delivery - £2.95* - Delivery within 3-5 working days.

Express UK Delivery - £4.95** - Delivery within 1-2 working days.

Temperature Controlled Delivery - £8.85 - Delivery within 1-3 working days.

Please Note: These prices are shown as a guide only. All delivery times are approximate but have been obtained in good faith.

*Excluding refrigerated products and treatments which are subject to different postage charges.


Discreet Delivery

All our items are sent completely discreet for your peace of mind.

This means the packaging is plain, there is no mention of what product is inside your package and there is no mention of Chemist4U either.

We respect that many of our products are of a sensitive nature - this is why we take every step to keep your purchases private.

Returns Information

Customers can read our full returns policy by clicking here

Benylin Mucus Cough Relief Night Syrup – 150ml Reviews

Robert Ingram,
Benylin Night gives strong relief from coughing if you have a bad chest infection which allows you to get a great sleep. It really helps me get through this heavy chest infection and blocked sinuses.
A. Summerton,
No comment.
Anna-Marie Coomber,
Nice tasting cough syrup, that helps break up mucus & helps you sleep.
Wilma Senior,
Helped relieve my night time cough
Wilma Senior,
Relieved my cough

Advice & Guides

Best medicines for dry, chesty, tickly or mucus coughs

Best medicines for dry, chesty, tickly or mucus coughs

Having a cough is never a good thing. A cough can often lead to other problems, such as a sore throat. Dealing with a cough can be difficult when there are different types of a cough and knowing which one you are suffering from can make all the difference when it comes to treating it.

Read More