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Full Marks Solution 5 Minute Treatment With Comb - Full Pack

Full Marks Solution 5 Minute Treatment With Comb - Full Pack

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  • ✔️ Kills head lice and eggs in just 5 minutes
  • ✔️ Dimeticone 4% works physically — no resistance risk
  • ✔️ Suitable for adults and children aged 6 months+
  • ✔️ Includes detection comb for thorough lice removal
  • ✔️ Non-insecticide formula — gentle on sensitive scalps

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Is Full Marks Solution the Right Head Lice Treatment 5 Minutes Solution for You?

 

Head lice are one of the most common childhood nuisances in the UK, affecting millions of families every year. If you've spotted the telltale signs — an itchy scalp, tiny white eggs (nits) attached to hair shafts, or live lice moving through the hair — you'll want something that works quickly and reliably. The head lice treatment 5 minutes approach offered by Full Marks Solution is designed to do exactly that. It's a dimeticone-based topical solution that physically kills lice and eggs without relying on traditional insecticides, making it a practical choice for households where previous treatments haven't worked. You can browse the full range of options in our head lice collection if you'd like to compare products before deciding.

The full pack includes the solution itself plus a detection comb — everything you need in one box. At £8.99, it's an accessible, pharmacy-trusted option that doesn't require a prescription.

 

How Does Full Marks Solution Work Against Head Lice?

 

Unlike older insecticide-based treatments, Full Marks Solution uses dimeticone 4% — a silicone fluid — as its active ingredient. The mechanism is entirely physical rather than chemical, which is why resistance isn't a concern with this product.

  • Dimeticone coats the louse's entire body, including its breathing tubes (spiracles).
  • It disrupts the louse's ability to excrete water, causing it to die from osmotic stress.
  • The solution also penetrates the egg casing, targeting unhatched nits as well as live lice.
  • The included detection comb helps remove dead lice and eggs from the hair after treatment.

Because the action is physical rather than neurotoxic, there is no risk of the lice developing resistance over time — a real advantage over some older pyrethroid-based products.

 

Who Should Use Full Marks Solution?

 

Full Marks Solution is suitable for a wide range of people. It's particularly useful when a previous treatment hasn't cleared the infestation, or when you want to avoid insecticide-based products. The NHS recommends wet combing or dimeticone-based products as first-line approaches for head lice management.

  • Children aged 6 months and over (always seek pharmacist advice for very young infants).
  • Adults with an active head lice infestation.
  • Individuals who have not responded to insecticide-based treatments.
  • Those who prefer a non-insecticide approach for personal or medical reasons.

It is not recommended for use on broken, irritated, or infected scalp skin without first consulting a healthcare professional. If you're also managing other skin concerns, our skin care collection may have relevant products to support your routine.

 

How Does Full Marks Solution Compare to Other Head Lice Treatments?

 

Feature Full Marks Solution (Dimeticone 4%) Insecticide-Based Treatment (e.g. Lyclear)
Active ingredient Dimeticone 4% (silicone) Permethrin (pyrethroid insecticide)
Mechanism Physical suffocation Neurotoxic disruption
Resistance risk None — physical action Possible — resistance reported in UK
Application time 5 minutes 10–30 minutes depending on product
Includes comb Yes (full pack) Varies by product

 

Is Full Marks Solution Safe to Store at Home?

 

Yes — but there are a few important points to keep in mind. Full Marks Solution is flammable, so you must keep it away from naked flames, cigarettes, and other heat sources during and immediately after application. Store it below 25°C, out of direct sunlight, and well out of reach of children. Do not use near an open fire or while smoking.

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.

Full Marks Solution 5 Minute Treatment With Comb - Full Pack specifications
Treatment category Head lice (pediculosis capitis)
Active ingredient Dimeticone 4%
Mechanism of action Physical suffocation of lice and eggs via silicone coating
Suitable for Adults and children aged 6 months and over
Pack contents Solution + detection comb (full pack)
UK classification General Sale / Pharmacy (P) medicine
Drug class Pediculicide (non-insecticide, physical action)
Preparation Topical solution
Route of administration Topical (applied to scalp and hair)
Application time 5 minutes

Specifications of Full Marks Solution 5 Minute Treatment With Comb - Full Pack

 

What Is Full Marks Solution and What Is It Used For?

 

Full Marks Solution 5 Minute Treatment is an over-the-counter topical preparation used to treat head lice infestations (pediculosis capitis) in adults and children aged 6 months and over. It contains dimeticone 4% as its active ingredient — a polydimethylsiloxane silicone fluid that works by physically immobilising and killing both live lice and their eggs (nits). The NHS advises that dimeticone-based products are an effective and well-tolerated option for treating head lice, particularly where insecticide resistance may be a factor. This product is not an antibiotic, antifungal, or systemic medicine — it acts entirely on the surface of the hair and scalp.

 

What Do You Need to Know Before Using Full Marks Solution?

 

Before applying Full Marks Solution, read the following warnings carefully. This product is for external use only and must not be swallowed or applied near the eyes or mouth.

Do not use Full Marks Solution if:

  • You are allergic to dimeticone or any other ingredient in the formulation.
  • The scalp skin is broken, infected, or severely inflamed — seek medical advice first.
  • The person to be treated is under 6 months of age, unless directed by a doctor.
  • You are near a naked flame, lit cigarette, or other ignition source — the solution is flammable.

Warnings and precautions:

  • Keep away from eyes. If contact occurs, rinse thoroughly with water.
  • Do not use a hairdryer or any heat source to dry hair immediately after application.
  • If you are pregnant or breastfeeding, consult your pharmacist before use.
  • Asthma sufferers should use in a well-ventilated room.

Drug interactions:

  • No clinically significant drug interactions have been identified for topical dimeticone.
  • Avoid using other hair or scalp products simultaneously during treatment.

 

How Should You Use Full Marks Solution?

 

Always follow the instructions provided in the pack. The treatment is straightforward, but thoroughness is key — missing sections of hair can leave lice behind. For children, it helps to have a second person apply the solution to ensure complete coverage. You may also find useful guidance on managing children's health products in our baby and toddler collection.

  1. Ensure hair is completely dry before starting.
  2. Apply Full Marks Solution directly to the scalp and work through to the ends of the hair.
  3. Make sure all hair is thoroughly saturated, paying particular attention to the nape of the neck and behind the ears.
  4. Leave the solution on for exactly 5 minutes — do not rinse off early.
  5. Using the detection comb provided, comb through the hair section by section to remove dead lice and eggs.
  6. Rinse hair thoroughly with warm water and a normal shampoo.
  7. Repeat the treatment after 7 days to kill any lice that may have hatched from eggs since the first application.
Indication Age Group Dose Frequency
Head lice infestation Adults and children ≥6 months Sufficient to cover all hair and scalp Apply twice, 7 days apart
Head lice infestation Infants under 6 months Only under medical supervision As directed by a doctor

 

What Are the Possible Side Effects of Full Marks Solution?

 

Full Marks Solution is generally well tolerated. Because dimeticone works physically rather than chemically, systemic side effects are not expected. However, as with any topical product, some people may experience localised reactions.

Common side effects:

  • Mild scalp irritation or tingling during application.
  • Temporary skin redness at the application site.
  • Greasy or heavy feeling in the hair immediately after use (resolves after rinsing).

Less common side effects:

  • Contact dermatitis (skin inflammation) in individuals with sensitive skin.
  • Eye irritation if the solution accidentally contacts the eyes.

If you experience a severe allergic reaction — including swelling of the face, lips, or throat, difficulty breathing, or widespread rash — stop use immediately and seek emergency medical attention.

 

How Should You Store Full Marks Solution?

 

Correct storage keeps the product safe and effective. Follow these guidelines:

  • Store below 25°C in a cool, dry place away from direct sunlight.
  • Keep away from naked flames, heat sources, and ignition points — the solution is flammable.
  • Keep the bottle tightly closed when not in use.
  • Store out of sight and reach of children.
  • Do not use after the expiry date printed on the packaging.
  • Do not dispose of via household drains — return unused product to your pharmacy for safe disposal.

If you're managing other household health products alongside this treatment, our hair care collection includes a range of complementary products to support scalp and hair health between treatments.

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 Full Marks Solution 5 Minute Treatment online in the UK?

You can buy Full Marks Solution 5 Minute Treatment With Comb directly from Cured Pharmacy for £8.99, with no prescription required. It's available as an over-the-counter product and can be ordered online for convenient home delivery. Browse our full head lice collection for additional treatment options.

How does Full Marks Solution work on head lice?

Full Marks Solution contains dimeticone 4%, a silicone-based fluid that physically coats lice and their eggs, blocking their ability to manage water and causing them to die. This physical mechanism means lice cannot develop resistance to it, unlike with some insecticide-based treatments. It works on both live lice and unhatched eggs (nits) within the 5-minute contact time.

How do I use Full Marks Solution step by step?

Apply the solution to completely dry hair, working from the roots to the tips and ensuring every strand is covered. Leave it on for 5 minutes, then comb through with the included detection comb before rinsing with warm water and shampoo. Repeat the process after 7 days to catch any lice that may have hatched since the first treatment.

Is Full Marks Solution safe for children?

Yes — Full Marks Solution is suitable for children aged 6 months and over, making it appropriate for most school-age children who are most commonly affected by head lice. Always keep the solution away from the eyes and mouth during application, and ensure the room is well ventilated. For infants under 6 months, seek advice from a doctor or pharmacist before use.

What are the side effects of Full Marks Solution?

Side effects are uncommon but can include mild scalp irritation, temporary skin redness, or a greasy sensation in the hair that resolves after rinsing. In rare cases, individuals with sensitive skin may experience contact dermatitis. If you notice any signs of a severe allergic reaction — such as swelling, difficulty breathing, or widespread rash — stop use immediately and seek medical attention.

How long does Full Marks Solution take to work?

Full Marks Solution is formulated to kill head lice within the 5-minute application period, making it one of the faster-acting options available without a prescription. The dimeticone acts immediately on contact, physically immobilising lice during this time. A second application after 7 days is recommended to ensure any newly hatched lice are also eliminated.

What is the best time to use Full Marks Solution?

There is no specific time of day required, but many people find it easiest to apply in the evening when there's no rush, allowing time for thorough application and combing. Make sure hair is completely dry before you start, as the solution works most effectively on dry hair. Avoid applying near open flames or heat sources at any time of day.

Who is eligible to use Full Marks Solution?

Full Marks Solution is suitable for adults and children aged 6 months and over who have a confirmed or suspected head lice infestation. It is particularly useful for those who have not responded to insecticide-based treatments or who prefer a non-insecticide approach. People with broken or infected scalp skin, or those who are pregnant or breastfeeding, should consult a pharmacist before use.

What happens if I miss the second treatment of Full Marks Solution?

Missing the second application (recommended 7 days after the first) increases the risk of re-infestation, as eggs that survived the first treatment may have hatched into live lice by this point. Apply the second treatment as soon as you remember, ideally within a day or two of the scheduled date. If more than 10 days have passed, speak to your pharmacist for further advice.

What are alternatives to Full Marks Solution for head lice?

Alternatives include other dimeticone-based products such as Hedrin Once Liquid Gel, or insecticide-based treatments containing permethrin (e.g. Lyclear Creme Rinse). Wet combing with a fine-toothed detection comb every few days is also recommended by the NHS as a non-chemical option. Your pharmacist can help you choose the most appropriate treatment based on your circumstances.

Can I use Full Marks Solution if I am pregnant or breastfeeding?

There is no specific contraindication listed for use during pregnancy or breastfeeding, as dimeticone is not absorbed systemically through the skin. However, as a precaution, you should always consult your pharmacist or GP before using any topical treatment during pregnancy or while breastfeeding. Wet combing is often suggested as the first-line approach in these situations.

How long can I keep using Full Marks Solution if lice keep returning?

Full Marks Solution can be used for each new infestation as needed, as there is no risk of resistance developing with a dimeticone-based product. However, if lice keep returning repeatedly, it's worth checking whether all household contacts have been treated simultaneously, as re-infestation from untreated individuals is the most common reason for recurrence. Speak to your pharmacist if you're struggling to clear an infestation after two full courses of treatment.

Does Full Marks Solution kill nits (eggs) as well as live lice?

Yes — dimeticone 4% is effective against both live lice and their eggs (nits), which is one of its key advantages over some older treatments that only target live insects. The solution penetrates the egg casing to disrupt the developing louse inside. Using the detection comb after treatment helps physically remove dead eggs from the hair shaft.

Can Full Marks Solution be used on colour-treated or chemically processed hair?

Full Marks Solution is generally considered safe to use on colour-treated or chemically processed hair, as dimeticone is a gentle silicone fluid that does not contain bleaching or stripping agents. However, if you have recently had a chemical treatment such as a perm or relaxer, it is advisable to check with your pharmacist or hairdresser before applying. Always perform a small patch test if you have any concerns about sensitivity.

What are the latest findings on dimeticone for head lice treatment?

Clinical evidence supports dimeticone as an effective and well-tolerated treatment for head lice, with studies showing high efficacy rates against both lice and eggs compared to some insecticide-based alternatives. The NHS and BNF both recognise dimeticone-based products as appropriate first-line treatments, particularly given the growing concern about pyrethroid resistance in UK lice populations. Research continues to confirm that physical-action treatments like dimeticone remain effective regardless of resistance patterns. You can find further hair health support in our hair care collection.

How Should You Use Full Marks Solution?

Full Marks Solution is applied directly to dry hair and scalp. Thorough coverage is essential — any missed sections of hair can allow lice to survive and re-establish. Work methodically from the roots to the tips, and pay particular attention to the nape of the neck and the area behind the ears, where lice tend to congregate.

Follow these steps carefully for the best results:

What Is the Correct Dose of Full Marks Solution?

There is no fixed volume dose — you should use enough solution to thoroughly saturate all of the hair and scalp. Longer or thicker hair will naturally require more product. The key is complete coverage rather than a specific measured amount.

The table below summarises the recommended dosing approach by age group:

When Is the Best Time to Use Full Marks Solution?

There is no medically specified time of day for application, but many people find the evening most practical. Applying in the evening gives you time to work through the hair carefully without rushing, and allows for thorough combing before bedtime. Avoid applying near open flames or heat sources at any time, and ensure the room is well ventilated throughout the process.

It's also worth treating all affected household members on the same day where possible, to prevent re-infestation between family members. Check all close contacts — particularly siblings and parents — for signs of lice before and after treatment.

How Long Can You Use Full Marks Solution For?

Full Marks Solution is intended for short-course use — two applications, seven days apart, per infestation episode. Because dimeticone works by physical action rather than chemical toxicity, there is no risk of resistance developing, and the product can be used again for any future infestation without reduced effectiveness.

If lice persist after completing two full courses of treatment, speak to your pharmacist. Persistent infestation is most commonly due to re-exposure from an untreated contact rather than treatment failure. Your pharmacist can advise on whether a different product or approach is needed.

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 Full Marks Solution?

Full Marks Solution is generally well tolerated by most people. Because dimeticone 4% works through a physical rather than chemical mechanism, systemic side effects are not expected. The most frequently reported reactions are mild and localised to the scalp and hair.

  • Mild scalp tingling or irritation during or shortly after application.
  • Temporary skin redness at the site of application.
  • A greasy or heavy feeling in the hair immediately after use — this resolves fully after rinsing.

What Are the Less Common Side Effects of Full Marks Solution?

Less commonly, some individuals — particularly those with sensitive or reactive skin — may experience more noticeable localised reactions. These are still generally mild and self-limiting.

  • Contact dermatitis: inflammation of the skin characterised by redness, itching, or a rash on the scalp or surrounding skin.
  • Eye irritation if the solution accidentally contacts the eyes — rinse immediately with plenty of clean water if this occurs.
  • Dryness or flaking of the scalp following repeated use.

What Are the Serious Side Effects of Full Marks Solution?

Serious adverse reactions to Full Marks Solution are rare. However, as with any topical product, a small number of people may experience a hypersensitivity or allergic reaction. You should be aware of the signs and act promptly if they occur.

Seek emergency medical attention immediately if you notice any of the following after using this product:

  • Swelling of the face, lips, tongue, or throat.
  • Difficulty breathing or swallowing.
  • Widespread skin rash, hives, or blistering.
  • Dizziness or feeling faint.

What Should You Do If You Experience Side Effects?

For mild side effects such as scalp irritation or redness, rinse the affected area thoroughly with cool water and discontinue use until the reaction settles. You do not need to seek medical attention for minor reactions unless they persist or worsen. If you experience eye contact, rinse immediately with clean water for several minutes and seek advice from a pharmacist or optician if irritation continues.

If you are unsure whether a reaction is serious, contact NHS 111 or your local pharmacist for guidance. Do not re-apply the product until you have sought advice if you have experienced any allergic-type reaction.

Can Full Marks Solution Interact With Other Medicines?

No clinically significant drug interactions have been identified for topically applied dimeticone. Because the active ingredient is not absorbed into the bloodstream in meaningful amounts, interactions with oral or systemic medicines are not expected. However, you should avoid applying other hair or scalp products — including conditioners, serums, or other medicated treatments — at the same time as Full Marks Solution, as these may reduce its effectiveness by diluting the solution or preventing full contact with the scalp.

If you are using any prescribed scalp treatments or have a skin condition affecting your scalp, speak to your pharmacist or GP before using Full Marks Solution.

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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