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Lemsip Cold and Flu – Sachets, Dosage and Safety Guide

Arthur Howard Clarke • 2026-04-19 • Reviewed by Hanna Berg

Lemsip Cold and Flu has been a staple in UK medicine cabinets for decades, offering temporary relief from the uncomfortable symptoms that accompany seasonal illnesses. The brand’s hot drink sachets combine active ingredients designed to address multiple cold and flu complaints simultaneously, from fever and headaches to nasal congestion and sore throats. Understanding the various formats, proper usage, and safety considerations helps consumers make informed decisions about this widely available over-the-counter remedy.

Available in lemon and blackcurrant flavours, Lemsip products are sold across major retailers including Boots, Tesco, and LloydsPharmacy, as well as numerous online pharmacies. While the sachets remain the flagship format, consumers frequently search for information about different variants, dosages, and purchasing options. This guide consolidates the essential details needed to use Lemsip Cold and Flu safely and effectively.

What are Lemsip Cold and Flu Sachets?

Formats Available
Sachets in Lemon, Blackcurrant; Max All in One variants
Key Active Ingredients
Paracetamol (650–1000mg), Phenylephrine hydrochloride (10–12.2mg)
Symptoms Relieved
Headache, fever, blocked nose, sore throat, body aches
Purchase Locations
Boots, Tesco, LloydsPharmacy, online pharmacies
  • Each sachet dissolves in hot water to create a soothing hot drink that provides symptomatic relief
  • Formulations vary between standard and Max versions, with some including additional ingredients like guaifenesin for mucus relief
  • The product is licensed for adults and children from age 12, though most variants specify age 16 and over
  • Contains paracetamol—users must avoid combining with other paracetamol-containing products
  • MHRA-approved for short-term relief of cold and flu symptoms
  • Prices typically range from £3 to £5 for standard packs of 10 sachets
Variant Paracetamol Phenylephrine Additional Ingredients
Standard Lemon 650mg 10mg Vitamin C
Max Cold & Flu 1000mg 12.2mg Vitamin C
Max All in One 1000mg 12.2mg Guaifenesin (mucus relief)
Blackcurrant Varies by formulation Varies As per specific PIL

Understanding the Active Ingredients

Paracetamol serves as the primary pain reliever and fever reducer in Lemsip products. This ingredient works by affecting the brain’s temperature regulation centre and blocking pain signals, providing relief from the headaches and fever commonly experienced during cold and flu infections.

Phenylephrine hydrochloride acts as a nasal decongestant, working to reduce swelling in the nasal passages. This helps relieve the blocked nose sensation that often accompanies respiratory infections, allowing for easier breathing during rest and sleep.

Correct Preparation Method

The sachets are designed to be dissolved in hot water that is not boiling, ensuring the active ingredients remain stable while creating a comfortable drink temperature. Users should empty the sachet contents into a mug, add hot water, and stir thoroughly until fully dissolved. The drink may be sweetened with sugar or honey according to personal preference.

Note on Sodium Content

Each Lemsip sachet contains approximately 129mg (5.6mmol) of sodium. Individuals following low-sodium diets should factor this into their daily intake and consult a pharmacist or doctor before use.

What are Lemsip Cold and Flu Tablets?

Search results do not indicate that Lemsip manufactures a tablet formulation under the Cold and Flu branding. The primary format available is the hot drink sachet, which distinguishes Lemsip from other cold and flu remedies sold in capsule or tablet form. The hot drink format provides the additional comfort benefit of a warm beverage alongside the medicinal ingredients.

Consumer searches frequently combine brand names with dosage forms that may not exist, which appears to be the case with “Lemsip Cold and Flu tablets.” Those seeking tablet-format cold and flu relief may wish to explore other over-the-counter options available at their local pharmacy.

Recommended Dosage for Sachets

Adults and children aged 16 and over should take one sachet dissolved in hot water every four to six hours as needed. The maximum recommended dose is four sachets within any 24-hour period. Some Max variants permit up to six sachets daily, though consumers should verify this against the specific product information leaflet included with their purchase.

Children aged 12 to 15 years may use certain formulations at reduced doses, with a maximum of four doses per 24 hours. Children under 12 years should not use Lemsip Cold and Flu unless specifically directed by a healthcare professional. For children approaching the age threshold, checking with a pharmacist helps ensure appropriate dosing.

Important Safety Information

Do not exceed the stated dose. Because Lemsip contains paracetamol, taking additional paracetamol through other products (including some pain relievers and combination cold medications) risks liver damage. Alcohol consumption increases this risk and should be avoided during treatment.

Duration of Treatment

Lemsip Cold and Flu is intended for short-term use only. Consumers should not use the product for more than a few days consecutively. If symptoms persist beyond five days or worsen during treatment, medical advice should be sought. A pharmacist can provide guidance on whether symptoms warrant further investigation or prescription treatment.

What is Lemsip Cold and Flu Syrup?

Research results do not identify a syrup formulation within the Lemsip Cold and Flu product range. The brand’s identity is closely associated with the hot drink sachet format, which offers both medicinal benefit and the soothing qualities of a warm beverage during illness.

Consumers specifically seeking liquid cold and flu remedies should ask their pharmacist about alternative products that provide similar symptomatic relief in syrup form. Pharmacists can recommend appropriate options based on individual symptoms, medical history, and any current medications being taken.

Comparing Available Formats

The hot drink sachets remain unique in offering warmth alongside medication, which many users find beneficial for overall comfort during illness. The heat helps soothe sore throats, and the steam from the hot drink can provide additional decongestant effects through inhalation.

Those requiring more portable dosing options might consider whether capsules or tablets from other brands would suit their lifestyle better. However, the warm drink experience provided by Lemsip sachets offers comfort benefits that solid dosage forms cannot replicate.

Storage Recommendation

Keep Lemsip sachets in a cool, dry place away from direct sunlight. The individually sealed sachets maintain product stability when stored properly, though the powder should be used immediately after dissolving in water.

What is Lemsip Cold and Flu Day and Night?

Search results do not identify a Day and Night differentiated product line within the Lemsip Cold and Flu range. Some cold and flu medication brands offer separate day and night formulations, with night versions typically including antihistamines to assist with sleep. Lemsip’s formulation does not follow this pattern.

Users concerned about drowsiness or those wanting separate day and night dosing schedules should consult their pharmacist about combination approaches. A pharmacist might recommend using Lemsip during the day alongside a separate night-time remedy if sleep disturbance from cold symptoms is a concern.

Evening and Nighttime Use

Lemsip does not contain ingredients known to cause significant drowsiness. The product can be taken in the evening and before bed without expectation of sedation. However, users should remain aware that phenylephrine may affect sleep patterns in some individuals, potentially making it more difficult to fall asleep shortly after taking a dose.

For evening use, taking the product several hours before intended sleep may be preferable for those sensitive to stimulants. Alternatively, consuming the hot drink earlier in the evening allows time for the medication’s effects to settle before attempting sleep.

Where to Buy Lemsip Cold and Flu (Tesco, Boots, and Prices)

Lemsip Cold and Flu products are widely available across UK retail channels. Major pharmacy chains including Boots and LloydsPharmacy stock the standard and Max formulations, typically in both lemon and blackcurrant flavours. Tesco and other supermarket chains also carry the product in their healthcare sections.

Online pharmacies such as TravelPharm, PharmacyOnline, and The Health Pharmacy offer convenient purchasing options with home delivery. These retailers often stock the complete Lemsip range, including specialty variants that may not be available at every physical retail location.

Average Pricing Range

Standard packs containing 10 sachets typically retail between £3 and £5, though exact prices vary by retailer and any promotional offers active at the time of purchase. Max variants with higher ingredient concentrations may be priced slightly higher than standard formulations.

Bulk purchasing or multi-pack deals may reduce the per-sachet cost for those who frequently use the product during cold and flu season. Checking weekly supermarket circulars and pharmacy loyalty schemes can identify opportunities for savings on larger purchases.

Checking Stock Availability

Given that stock levels fluctuate, particularly during peak cold and flu season, calling ahead to confirm availability at specific locations can save unnecessary trips. Most major pharmacy chains offer stock check services through their websites or mobile applications, allowing consumers to verify product availability before visiting a store.

What is Confirmed and What Remains Unclear?

Established Information

Lemsip Cold and Flu sachets are MHRA-approved over-the-counter medicines containing paracetamol and phenylephrine hydrochloride as active ingredients. The products provide temporary symptomatic relief for headaches, fever, blocked nose, sore throat, and body aches associated with cold and flu infections.

The standard dosage is one sachet every four to six hours, with a maximum of four sachets in 24 hours for most formulations. The products are suitable for adults and children aged 12 years and over (with age restrictions varying by specific product). Official product information leaflets are available from medicines.org.uk, providing authoritative guidance on usage, warnings, and possible side effects.

Information Requiring Further Verification

Precise retail pricing varies by store and promotional period, making specific price confirmation necessary before purchase. Whether Lemsip produces tablet, syrup, or day/night formulations remains unconfirmed based on available research—consumers seeking these formats should verify with the manufacturer or check alternative brands.

Regional availability beyond the UK market shows Lemsip presence in New Zealand, though product formulations may differ between countries. Users travelling internationally should verify that any purchased products match the formulations they expect based on UK product information.

Safety Considerations and When to Seek Medical Advice

As with all medicines containing paracetamol, exceeding the recommended dose carries risk of serious liver damage. This risk increases significantly when alcohol is consumed during treatment. Consumers must also ensure they are not taking other products containing paracetamol simultaneously, as this can easily lead to inadvertent overdose.

Pregnant or breastfeeding individuals should consult a doctor or pharmacist before using Lemsip Cold and Flu. While paracetamol is generally considered appropriate during pregnancy when necessary, phenylephrine’s safety profile during pregnancy and lactation requires professional assessment on an individual basis.

Those with pre-existing liver conditions, kidney problems, or heart disease should seek medical advice before using this product. The sodium content (129mg per sachet) may be relevant for individuals managing sodium intake for cardiovascular or kidney health reasons.

Official Sources and Where to Find Further Information

“For short-term relief of the symptoms of colds and influenza, including headache, aches and pains, fever, congestion and sore throat.”

— Lemsip Product Information Leaflet, medicines.org.uk

The authoritative source for Lemsip Cold and Flu information in the UK is medicines.org.uk, which hosts the official Patient Information Leaflets (PILs) and Summary of Product Characteristics (SmPC) documents. These documents contain comprehensive details on indications, contraindications, dosage instructions, and potential side effects.

Consumers with questions about appropriate use, potential interactions with current medications, or concerns about symptoms should consult a pharmacist or contact NHS 111 for guidance. For persistent symptoms or signs of more serious illness, visiting a GP ensures proper assessment and treatment recommendations.

Understanding proper usage, ingredient contents, and safety considerations helps consumers use Lemsip Cold and Flu appropriately as part of their cold and flu management routine. Combined with adequate rest, hydration, and appropriate nutrition, the product can provide meaningful temporary relief during seasonal illness.

Frequently Asked Questions

How many Lemsip Cold and Flu sachets can I take in one day?

Most Lemsip Cold and Flu variants recommend a maximum of four sachets in any 24-hour period. Some Max formulations permit up to six sachets, but consumers should verify this against the specific product information leaflet included with their purchase.

Can children take Lemsip Cold and Flu?

Most Lemsip products are licensed for adults and children aged 16 years and over. Certain formulations may be suitable for children aged 12 to 15 years at reduced doses, with a maximum of four doses per 24 hours. Children under 12 should not use this product unless directed by a healthcare professional.

How long should I wait between Lemsip doses?

Doses should be spaced at least four to six hours apart. Taking doses closer together increases the risk of side effects and accidental overdose. Maintaining the minimum interval between sachets helps ensure safe and effective symptom relief.

Can I take Lemsip with other cold medicines?

Caution is essential when combining cold remedies. Lemsip contains paracetamol and phenylephrine, so taking other products containing these ingredients risks overdose. Always check with a pharmacist before combining medications to ensure safety.

How should I prepare a Lemsip hot drink?

Empty the sachet contents into a mug and add hot (not boiling) water. Stir thoroughly until fully dissolved. The drink may be sweetened with sugar or honey according to preference. Consume immediately while hot for maximum comfort benefit.

Is Lemsip safe during pregnancy?

Pregnant individuals should consult a doctor or pharmacist before using Lemsip Cold and Flu. While paracetamol is generally considered appropriate during pregnancy, the phenylephrine component requires individual assessment based on circumstances and gestational stage.

Does Lemsip make you drowsy?

Lemsip Cold and Flu does not contain ingredients known to cause significant drowsiness. However, phenylephrine may affect sleep in some individuals. The product is generally suitable for daytime and evening use without expectation of sedation.

Where can I find the official product information?

Official Patient Information Leaflets are available from medicines.org.uk. These documents provide comprehensive information on indications, dosage, warnings, side effects, and contraindications approved by regulatory authorities.

Arthur Howard Clarke

About the author

Arthur Howard Clarke

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