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Lemsip Cold & Flu Lemon 10 Powder Sachets Fever Blocked Nose Sore Throat

Lemsip Cold & Flu Lemon 10 Powder Sachets Fever Blocked Nose Sore Throat

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  • ✔️ Relieves fever, sore throat, headache, and blocked nose simultaneously
  • ✔️ Contains paracetamol 650mg and phenylephrine 10mg per sachet
  • ✔️ Soothing hot lemon drink format eases throat irritation on contact
  • ✔️ Suitable for adults and young people aged 12 and over
  • ✔️ 10 sachets per pack for multi-day cold and flu symptom relief

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What Are Lemsip Cold and Flu Lemon Sachets?

 

When a cold or flu hits, it rarely arrives with just one symptom. You get the fever, the blocked nose, the sore throat — sometimes all at once. Lemsip Cold and Flu Lemon sachets are a well-established over-the-counter remedy designed to tackle exactly that combination. Each hot lemon drink contains two active ingredients — paracetamol and phenylephrine hydrochloride — working together to bring you relief from the most disruptive cold and flu symptoms. At £7.99 for 10 sachets, it's a practical option to keep in the medicine cabinet during the colder months.

Colds and flu are among the most common reasons people seek pharmacy advice in the UK. The NHS notes that most adults experience two to four colds per year, with symptoms typically lasting up to ten days. If you're looking for broader support during cold season, you might also find our cold and flu collection useful for comparing available options.

 

How Do Lemsip Cold and Flu Sachets Work?

 

The relief you feel from Lemsip comes down to its two active ingredients working through different mechanisms simultaneously.

  • Paracetamol (650mg per sachet): Acts centrally to reduce fever by affecting the hypothalamus — the brain's temperature-regulating centre. It also inhibits prostaglandin synthesis in the central nervous system, which helps relieve headache and sore throat pain.
  • Phenylephrine hydrochloride (10mg per sachet): A sympathomimetic decongestant that works by stimulating alpha-adrenergic receptors in the nasal mucosa. This causes vasoconstriction — narrowing of blood vessels — which reduces swelling and congestion in the nasal passages.
  • Hot lemon drink format: The warm liquid itself can help soothe an irritated throat and may ease nasal congestion through steam inhalation as you drink.

The combination means you're not just masking one symptom — you're addressing fever, pain, and nasal congestion at the same time.

 

Who Is Lemsip Cold and Flu Lemon Suitable For?

 

Lemsip Cold and Flu Lemon sachets are suitable for most adults and adolescents aged 12 and over who are experiencing cold or flu symptoms. They're particularly useful if you're dealing with more than one symptom at once and want a single product to cover them.

  • Adults aged 18 and over with cold or flu symptoms
  • Adolescents aged 12–17 (under adult supervision)
  • People experiencing fever, headache, sore throat, or blocked nose simultaneously
  • Those who prefer a warm drink format over tablets or capsules

It is not suitable for children under 12, and certain medical conditions or medications may make it unsuitable — see the patient information section below for full details.

 

How Does Lemsip Compare to Other Cold and Flu Remedies?

 

Feature Lemsip Cold & Flu Lemon Sachets Beechams All-In-One Liquid
Active ingredients Paracetamol 650mg + Phenylephrine 10mg Paracetamol 250mg + Phenylephrine 5mg + Guaifenesin 100mg
Format Hot lemon drink powder sachet Oral liquid
Symptoms targeted Fever, headache, sore throat, blocked nose Fever, headache, blocked nose, chesty cough
Suitable age 12 years and over 12 years and over

 

How Should You Store Lemsip Cold and Flu Sachets?

 

Store your Lemsip Cold and Flu Lemon sachets below 25°C in a dry place, away from direct sunlight. Keep them out of reach and sight of children at all times. Do not use sachets after the expiry date printed on the packaging.

If you're stocking up your home medicine cabinet for winter, it's worth pairing these with other essentials. Our pain relief collection includes a range of complementary options for managing aches and discomfort alongside cold symptoms.

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.

Lemsip Cold & Flu Lemon 10 Powder Sachets specifications
Treatment category Cold and flu relief
Mechanism of action Paracetamol reduces fever and pain; phenylephrine decongests nasal passages via vasoconstriction
Effective for Fever, headache, sore throat, blocked nose
Suitable for Adults and children aged 12 and over
Active ingredients Paracetamol 650mg, Phenylephrine hydrochloride 10mg
Pack size 10 sachets
UK classification General Sale List (GSL)
Drug class Analgesic / Decongestant
Preparation Powder for oral solution
Route of administration Oral (dissolved in hot water)

Specifications of Lemsip Cold & Flu Lemon 10 Powder Sachets

 

What Is Lemsip Cold and Flu Lemon and What Is It Used For?

 

Lemsip Cold and Flu Lemon sachets are an over-the-counter medicine used to relieve the symptoms of colds and influenza in adults and children aged 12 and over. Each sachet contains paracetamol 650mg and phenylephrine hydrochloride 10mg. Paracetamol is an analgesic and antipyretic — it reduces pain and brings down a high temperature. Phenylephrine is a nasal decongestant that helps clear a blocked nose by reducing swelling in the nasal lining.

The product is indicated for the symptomatic relief of fever, headache, sore throat, and nasal congestion associated with colds and flu. It is not an antiviral and will not shorten the duration of illness, but it can make you feel considerably more comfortable while your immune system does its work. The NHS advises that most colds resolve on their own within 7 to 10 days.

 

What Do You Need to Know Before Using Lemsip Cold and Flu Sachets?

 

Before using these sachets, it's important to check whether they are appropriate for you. Do not use Lemsip Cold and Flu Lemon if any of the following apply:

  • You are under 12 years of age
  • You are allergic to paracetamol, phenylephrine, or any other ingredient in the sachet
  • You have severe liver disease or severe kidney disease
  • You have uncontrolled high blood pressure (hypertension)
  • You have phaeochromocytoma (a rare adrenal gland tumour)
  • You are currently taking or have taken monoamine oxidase inhibitors (MAOIs) within the last 14 days
  • You have hyperthyroidism (overactive thyroid)

Speak to your pharmacist or GP before using if you are pregnant, breastfeeding, have heart disease, diabetes, or are taking other medicines. The NHS recommends seeking advice before taking decongestants if you have cardiovascular conditions.

Be aware of the following potential drug interactions:

  • Other paracetamol-containing products — risk of paracetamol overdose
  • MAOIs and tricyclic antidepressants — risk of hypertensive crisis with phenylephrine
  • Beta-blockers — phenylephrine may reduce their effectiveness
  • Warfarin and other anticoagulants — regular paracetamol use may enhance anticoagulant effect
  • Domperidone and metoclopramide — may increase the rate of paracetamol absorption

 

How Should You Use Lemsip Cold and Flu Lemon Sachets?

 

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. Empty the contents of one sachet into a mug.
  2. Add freshly boiled water that has been allowed to cool slightly — the water should be hot but not boiling.
  3. Stir well until the powder is fully dissolved.
  4. Drink while still hot. You may add sugar or honey to improve the taste if preferred.
  5. Wait at least 4 hours before taking another sachet.
Age Group Dose Frequency Maximum in 24 hours
Adults and children aged 12+ 1 sachet Every 4–6 hours 4 sachets
Children under 12 Not suitable

If you are also taking other medicines for pain or fever, check with your pharmacist first — doubling up on paracetamol is a common and potentially serious mistake. You can explore additional symptom management options in our ear, nose and throat collection.

 

What Are the Possible Side Effects of Lemsip Cold and Flu Sachets?

 

Like all medicines, Lemsip Cold and Flu Lemon sachets can cause side effects, although not everyone experiences them. Most people tolerate the product well when taken at the recommended dose.

Common side effects (may affect up to 1 in 10 people):

  • Nausea
  • Difficulty sleeping (insomnia) — related to phenylephrine's stimulant effect
  • Mild increase in heart rate or blood pressure

Less common side effects (may affect up to 1 in 100 people):

  • Headache (paradoxically, in some individuals)
  • Dizziness
  • Skin rash or itching
  • Palpitations

Stop taking Lemsip and seek immediate medical attention if you develop signs of a serious allergic reaction, including swelling of the face, lips, or throat, difficulty breathing, or a severe skin reaction. Paracetamol overdose is a medical emergency — if you suspect you or someone else has taken too much, go to A&E immediately even if you feel well, as liver damage may not be apparent for several days.

 

How Should You Store Lemsip Cold and Flu Lemon Sachets?

 

  • Store below 25°C in a dry place
  • Keep away from direct sunlight and moisture
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the outer carton
  • Do not store in a bathroom or near a sink — humidity can affect the powder
  • Dispose of unused sachets responsibly — return to a pharmacy for safe disposal

If you're building a well-stocked home medicine cabinet, consider pairing Lemsip with products from our vitamins and supplements collection — vitamin C and zinc are commonly used to support immune function during cold season, though evidence for their effectiveness varies.

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 Lemsip Cold and Flu Lemon sachets online in the UK?

You can buy Lemsip Cold and Flu Lemon sachets directly from Cured Pharmacy online for £7.99 with fast UK delivery. They are a General Sale List (GSL) medicine, meaning no prescription is needed. They're also widely available in pharmacies and supermarkets across the UK.

How do Lemsip Cold and Flu Lemon sachets work in the body?

Each sachet contains paracetamol 650mg, which reduces fever by acting on the hypothalamus and relieves pain by inhibiting prostaglandin synthesis. Phenylephrine hydrochloride 10mg acts as a nasal decongestant by causing vasoconstriction in the nasal mucosa, reducing swelling and congestion. Together, they address multiple cold and flu symptoms simultaneously.

How do I prepare and use Lemsip Cold and Flu Lemon sachets correctly?

Empty one sachet into a mug, add hot (not boiling) water, and stir until fully dissolved. Drink the hot lemon drink while it's still warm — you can add sugar or honey if preferred. Take one sachet every 4 to 6 hours as needed, and never exceed 4 sachets in 24 hours.

What is the correct dose of Lemsip Cold and Flu sachets for adults?

Adults and young people aged 12 and over should take one sachet every 4 to 6 hours. The maximum dose is 4 sachets in any 24-hour period. Do not take more than this, as exceeding the recommended dose of paracetamol can cause serious liver damage.

Can I take Lemsip Cold and Flu sachets with paracetamol tablets?

No — you must not take Lemsip alongside other paracetamol-containing products, including paracetamol tablets, co-codamol, or other cold and flu remedies that contain paracetamol. Doing so risks exceeding the safe daily dose of paracetamol, which can cause serious liver damage. Always check the ingredients of any other medicine you are taking.

Who should not use Lemsip Cold and Flu Lemon sachets?

Lemsip Cold and Flu Lemon sachets are not suitable for children under 12, people with severe liver or kidney disease, those with uncontrolled high blood pressure, or anyone taking MAOIs. People with hyperthyroidism, phaeochromocytoma, or heart disease should also seek medical advice before use. If you are pregnant or breastfeeding, speak to your pharmacist or GP first.

What are the side effects of Lemsip Cold and Flu sachets?

Side effects are uncommon at the recommended dose but may include nausea, difficulty sleeping, mild palpitations, or a slight rise in blood pressure due to phenylephrine. Serious allergic reactions are rare but require immediate medical attention — symptoms include facial swelling, difficulty breathing, or a severe skin rash. If you experience any concerning symptoms, stop taking the product and contact your pharmacist or GP.

Can I take Lemsip Cold and Flu sachets if I have high blood pressure?

If your high blood pressure is well-controlled and you are not taking MAOIs or beta-blockers, you may be able to use Lemsip, but you should check with your pharmacist or GP first. Phenylephrine can raise blood pressure, so it is not recommended for people with uncontrolled hypertension. Your pharmacist can suggest a decongestant-free alternative if needed.

Is Lemsip Cold and Flu Lemon safe to take during pregnancy?

Paracetamol is generally considered the pain reliever of choice during pregnancy when used at the lowest effective dose for the shortest time, but phenylephrine (the decongestant in Lemsip) is not recommended during pregnancy. You should speak to your midwife, GP, or pharmacist before taking any cold remedy while pregnant. They can advise on the safest options for your specific situation.

What happens if I accidentally take too many Lemsip sachets?

If you take more than the recommended dose, seek medical attention immediately — even if you feel well. Paracetamol overdose can cause serious liver damage that may not become apparent for several days. Go to your nearest A&E or call 999, and take the packaging with you so medical staff can see exactly what you have taken.

How long can I use Lemsip Cold and Flu sachets for?

Do not use Lemsip Cold and Flu sachets for more than 5 days for pain relief or more than 3 days for fever without consulting a doctor or pharmacist. If your symptoms persist, worsen, or are accompanied by a high fever that doesn't respond to treatment, seek medical advice. Prolonged use without review is not recommended.

What are the alternatives to Lemsip Cold and Flu sachets?

Alternatives include other combination cold and flu remedies such as Beechams All-In-One, Day Nurse, or Night Nurse, as well as simple paracetamol or ibuprofen for fever and pain without the decongestant. You can browse a range of options in our cold and flu collection. Your pharmacist can help you choose the most appropriate product based on your specific symptoms.

Can I take Lemsip Cold and Flu sachets with ibuprofen?

Paracetamol and ibuprofen can generally be taken together as they work through different mechanisms, but you should check with your pharmacist before combining Lemsip with ibuprofen or any other medicine. Ibuprofen is not suitable for everyone — particularly those with stomach ulcers, kidney problems, or asthma. Always read the labels of both products carefully.

Is Lemsip Cold and Flu Lemon suitable for children?

Lemsip Cold and Flu Lemon sachets are not suitable for children under 12 years of age. For younger children, age-appropriate paracetamol or ibuprofen suspensions are recommended — you can find suitable options in our baby and toddler collection. Always follow the dosage instructions for the child's age and weight, and seek GP advice if you are unsure.

What does the latest research say about cold and flu remedies like Lemsip?

Current evidence supports the use of paracetamol for symptomatic relief of fever and pain in colds and flu, and phenylephrine is an established oral decongestant used in many combination cold remedies. Some research has questioned the efficacy of oral phenylephrine at standard doses compared to pseudoephedrine, but it remains a widely used and licensed ingredient in the UK. The NHS continues to recommend symptomatic treatment with analgesics and rest as the mainstay of cold and flu management.

How Should You Use Lemsip Cold and Flu Lemon Sachets?

Using Lemsip correctly is straightforward, but it's worth following the steps carefully to get the most from each sachet and avoid any risk of taking too much paracetamol. Always read the patient information leaflet before use.

Do not prepare the drink in advance and leave it to go cold. The warm liquid helps soothe your throat and the steam may offer mild nasal relief as you drink.

What Is the Correct Dose of Lemsip Cold and Flu Lemon Sachets?

The dose is the same for all eligible users — one sachet per dose, up to four times daily. Never exceed four sachets in any 24-hour period, as each sachet contains 650mg of paracetamol and the maximum safe daily dose for adults is 4,000mg (4g). Taking more than the recommended amount can cause serious liver damage, even if you feel well at the time.

When Is the Best Time to Use Lemsip Cold and Flu Lemon Sachets?

There is no single "best" time — you should take a sachet when your symptoms are most troublesome. Many people find it helpful to take one first thing in the morning when fever and congestion tend to feel worse after a night's sleep, and again in the early evening. Avoid taking a sachet too close to bedtime if you are sensitive to stimulants, as phenylephrine can occasionally cause difficulty sleeping in some individuals.

If you are taking regular doses throughout the day, try to space them evenly — every 4 to 6 hours — to maintain consistent symptom relief.

How Long Can You Use Lemsip Cold and Flu Lemon Sachets For?

Do not use Lemsip Cold and Flu Lemon sachets for more than 5 days for pain relief or more than 3 days for fever without speaking to a doctor or pharmacist. Cold and flu symptoms typically improve within 7 to 10 days, but if your fever is very high, your symptoms are getting worse rather than better, or you develop new symptoms such as chest pain or difficulty breathing, seek medical advice promptly.

Prolonged use of decongestants beyond the recommended period is not advised, and continued use of paracetamol beyond 5 days should only be done under medical supervision.

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 Lemsip Cold and Flu Sachets?

Most people who take Lemsip Cold and Flu Lemon sachets at the recommended dose do not experience significant side effects. However, as with any medicine, some people may notice unwanted effects. The most commonly reported side effects are largely related to the phenylephrine component.

  • Nausea or an unsettled stomach
  • Difficulty sleeping or feeling more alert than usual (insomnia)
  • Mild increase in heart rate (tachycardia)
  • Slight rise in blood pressure

What Are the Less Common Side Effects of Lemsip Cold and Flu Sachets?

Less commonly, some people may experience the following. These effects are not typical but are worth being aware of, particularly if you have any underlying health conditions.

  • Headache
  • Dizziness or light-headedness
  • Palpitations (awareness of your heartbeat)
  • Skin rash, itching, or hives
  • Dry mouth
  • Restlessness or anxiety

What Are the Serious Side Effects of Lemsip Cold and Flu Sachets?

Serious side effects are rare but require immediate medical attention. Stop taking Lemsip and seek emergency help if you experience any of the following:

  • Signs of a severe allergic reaction (anaphylaxis): swelling of the face, lips, tongue, or throat; difficulty breathing; a sudden drop in blood pressure; or a widespread skin rash
  • Signs of liver damage from paracetamol overdose: nausea, vomiting, abdominal pain, and jaundice (yellowing of the skin or eyes) — these may not appear for 24–72 hours after an overdose
  • Severe or persistent chest pain or a very rapid heartbeat
  • Severe skin reactions such as Stevens-Johnson syndrome (blistering, peeling skin) — extremely rare

If you suspect a paracetamol overdose, go to A&E immediately even if you feel well. Do not wait for symptoms to develop.

What Should You Do If You Experience Side Effects of Lemsip?

For mild side effects such as nausea, try taking the sachet with a small amount of food or a glass of water alongside the hot drink. If you experience difficulty sleeping, avoid taking a sachet within 4 hours of bedtime. If any side effect is persistent, worsening, or causing you concern, stop using the product and speak to your pharmacist or GP.

You can also report suspected side effects directly to the MHRA through the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps improve medicine safety information for everyone.

Can Lemsip Cold and Flu Sachets Interact With Other Medicines?

Yes — interactions are possible and some are clinically significant. The most important interaction is with other paracetamol-containing medicines, which can lead to accidental overdose. Phenylephrine interacts with MAOIs (used for depression) and can cause a dangerous rise in blood pressure. It may also reduce the effectiveness of beta-blockers and interact with tricyclic antidepressants. Warfarin users should be aware that regular paracetamol use can enhance the anticoagulant effect, increasing bleeding risk. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are taking before starting Lemsip.

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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