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Jungle Formula Plug In Refill

Jungle Formula Plug In Refill

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  • ✔️ Repels and kills mosquitoes indoors using prallethrin vapour
  • ✔️ Lasts up to 45 nights at 8 hours use per night
  • ✔️ No skin contact needed — hands-free ambient protection
  • ✔️ Compatible with Jungle Formula electric plug-in device
  • ✔️ Ideal for bedrooms during peak mosquito season

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What Is an Insect Repellent Plug In Refill?

 

If mosquitoes are making your evenings at home uncomfortable, the insect repellent plug in refill from Jungle Formula offers a simple, hands-free solution. Designed to work with the Jungle Formula plug-in device, this refill quietly gets on with the job while you sleep, relax, or go about your evening routine. Mosquitoes are more than just a nuisance — the NHS notes that in some parts of the world they can transmit serious diseases, and even in the UK, their bites can cause significant irritation and disturbed sleep. If you're planning travel or simply want to protect your home during warmer months, you might also want to explore our travel health range for additional protection.

At just £6.99, this refill is a cost-effective way to maintain continuous indoor protection without the need for sprays or topical applications. It slots directly into the existing Jungle Formula plug-in unit, making it straightforward to replace when your current refill runs out.

 

How Does the Jungle Formula Plug In Refill Work?

 

The refill works by releasing a measured amount of prallethrin vapour into the surrounding air when heated by the plug-in device. Prallethrin is a synthetic pyrethroid — a class of insecticide modelled on naturally occurring pyrethrins found in chrysanthemum flowers. When the device is plugged into a mains socket, the heating element warms the liquid in the refill bottle, causing it to evaporate gradually into the room.

  • Prallethrin vapour disperses throughout the room at low concentrations
  • The vapour acts on the nervous system of mosquitoes and flying insects, repelling or killing them on contact
  • The device operates continuously while plugged in, providing overnight or all-evening coverage
  • One refill lasts up to 45 nights at approximately 8 hours of use per night

 

Who Should Use the Jungle Formula Plug In Refill?

 

This product is suited to anyone who wants effective indoor protection from mosquitoes and flying insects without applying anything directly to their skin. It's particularly useful during summer months or after returning from travel to mosquito-prone regions. It is not a substitute for topical repellents in high-risk areas abroad, but it provides a reliable layer of protection at home.

  • Adults seeking overnight mosquito protection indoors
  • Households in areas with seasonal mosquito activity
  • Travellers returning from abroad who want to maintain protection at home
  • Anyone who prefers a no-touch, ambient repellent method over sprays or lotions

 

How Does the Jungle Formula Plug In Refill Compare to Topical Repellents?

 

Feature Jungle Formula Plug In Refill Topical DEET Spray
Application method Ambient vapour — no skin contact Applied directly to skin
Suitable for outdoor use No — indoor use only Yes — indoor and outdoor
Duration per unit Up to 45 nights 4–8 hours per application
Suitable for sensitive skin Yes — no direct skin contact May cause irritation in some users

 

Is the Jungle Formula Plug In Refill Suitable for All Households?

 

The insect repellent plug in refill is designed for use in well-ventilated rooms and should not be used in very small, sealed spaces. It is not recommended for use in rooms where birds, fish, or other small pets are kept, as prallethrin can be harmful to these animals. Always ensure a window or door is slightly open when the device is in use. If anyone in your household has a respiratory condition such as asthma, speak to a pharmacist before use — you may also find our allergy and hay fever range helpful for managing related sensitivities.

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.

Jungle Formula Plug In Refill specifications
Treatment category Insect repellent / insecticide
Mechanism of action Prallethrin vapour repels and kills mosquitoes via pyrethroid action on insect nervous system
Effective against Mosquitoes and flying insects (indoor use)
Suitable for Adults; use with caution around children and pets
Active ingredient Prallethrin
UK classification General Sale / Biocidal product
Drug class Synthetic pyrethroid insecticide
Preparation Liquid refill for electric plug-in device
Route of administration Ambient inhalation via heated vapour

Specifications of Jungle Formula Plug In Refill

 

What Is the Jungle Formula Plug In Refill and What Is It Used For?

 

The Jungle Formula Plug In Refill is a replacement liquid cartridge for use with the Jungle Formula electric plug-in mosquito repellent device. It is used to protect indoor spaces from mosquitoes and other flying insects by releasing prallethrin vapour into the surrounding air. This makes it particularly useful during warmer months when mosquito activity increases, or after returning from travel to regions where mosquitoes are prevalent. The NHS advises that preventing insect bites is an important step in reducing the risk of insect-borne illness, especially when travelling abroad.

 

What Do You Need to Know Before Using the Jungle Formula Plug In Refill?

 

Before using this product, read the label carefully. It is intended for indoor use only and must be used with the compatible Jungle Formula plug-in device. Do not use it as a topical product or apply the liquid to skin.

Do not use this product if:

  • You are allergic to prallethrin or any other pyrethroid insecticide
  • The room cannot be adequately ventilated
  • You keep fish, birds, or small reptiles in the same room — pyrethroids are toxic to these animals
  • You are using it in a very small, enclosed space without airflow

Use with caution if:

  • You have asthma or chronic obstructive pulmonary disease (COPD)
  • You have known sensitivities to insecticide vapours
  • Children under 2 years are present — seek pharmacist advice first
  • You are pregnant or breastfeeding — consult your GP or pharmacist before use

Known interactions:

  • No significant drug interactions are known for ambient prallethrin vapour at recommended concentrations
  • Avoid simultaneous use with other insecticide devices in the same small room

 

How Should You Use the Jungle Formula Plug In Refill?

 

Using the refill correctly ensures you get the most effective protection while keeping your household safe. Always follow the manufacturer's instructions included with the device.

  1. Remove the used refill bottle from the plug-in device by unscrewing or pulling it free, depending on your device model
  2. Take the new Jungle Formula Plug In Refill and remove any protective cap or seal
  3. Insert the refill bottle firmly into the base of the plug-in device until it is secure
  4. Plug the device into a standard UK mains socket (230V) at a low level — near the floor is most effective as mosquitoes tend to fly low
  5. Switch the device on and ensure the room has some ventilation (a slightly open window or door is sufficient)
  6. Leave the device running for the duration of the evening or overnight — typically 8 hours per session
Indication Age Group Usage Frequency
Indoor mosquito protection Adults One refill per device Continuous use up to 8 hrs/night
Indoor mosquito protection Children (2+ years) Use in ventilated room only As above; seek pharmacist advice
Indoor mosquito protection Under 2 years Not recommended without medical advice Consult GP or pharmacist

 

What Are the Possible Side Effects of the Jungle Formula Plug In Refill?

 

When used as directed in a ventilated room, most people do not experience side effects. However, as with any insecticide product, some individuals may notice mild reactions, particularly those with pre-existing respiratory sensitivities. If you experience any of the following, switch off the device and ventilate the room immediately.

Common side effects (may affect some users):

  • Mild throat or nasal irritation
  • Watery eyes
  • Mild headache if used in a poorly ventilated space

Less common side effects:

  • Skin irritation if the liquid comes into direct contact with skin
  • Worsening of asthma symptoms in susceptible individuals
  • Dizziness or nausea in very poorly ventilated rooms

If you accidentally ingest any of the liquid, contact NHS 111 or your nearest A&E immediately. For general first aid supplies and wound care, our first aid collection may also be useful to have at home.

 

How Should You Store the Jungle Formula Plug In Refill?

 

Correct storage keeps the refill effective and prevents accidental exposure. Follow these guidelines:

  • Store below 25°C in a cool, dry place away from direct sunlight
  • Keep away from heat sources, open flames, and naked lights — the liquid is flammable
  • Store upright to prevent leakage
  • Keep out of reach of children and pets at all times
  • Do not store near food, drink, or animal feed
  • Keep in original packaging until ready to use
  • Dispose of empty refills responsibly in accordance with local waste regulations — do not puncture or incinerate

If you are travelling and need broader insect protection advice, the NHS travel health pages offer guidance on preventing bites abroad. You can also browse our skin care range for products to soothe any insect bite reactions.

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 the Jungle Formula Plug In Refill online in the UK?

You can buy the Jungle Formula Plug In Refill directly from Cured Pharmacy online for £6.99 with fast UK delivery. It is available without a prescription as an over-the-counter product. No appointment or consultation is needed — simply add it to your basket and check out.

How does the Jungle Formula Plug In Refill work indoors?

The refill contains prallethrin, a synthetic pyrethroid insecticide that is gently heated by the plug-in device and released as a vapour into the room. This vapour acts on the nervous system of mosquitoes and flying insects, repelling or killing them before they can bite. The process is continuous while the device is switched on, providing consistent overnight protection.

How do I fit the Jungle Formula Plug In Refill into the device?

Remove the old refill from the device, take off any protective seal from the new refill, and insert it firmly into the base of the plug-in unit. Plug the device into a mains socket at a low height — near the floor works best as mosquitoes tend to fly low. Ensure the room has some ventilation before switching it on.

How long does one Jungle Formula Plug In Refill last?

One refill is designed to last up to 45 nights when used for approximately 8 hours per night. If you use the device on a higher setting or for longer periods, the refill will deplete more quickly. It is worth keeping a spare refill at home so you are never caught without protection.

Is the Jungle Formula Plug In Refill safe to use around children?

The product can be used in rooms where children are present, provided the room is adequately ventilated with a window or door slightly open. It is not recommended for use in rooms with children under 2 years without first seeking pharmacist or GP advice. Always keep the refill bottle itself out of reach of children, as the liquid is harmful if swallowed.

Can I use the Jungle Formula Plug In Refill if I have asthma?

If you have asthma or another respiratory condition, you should speak to your GP or pharmacist before using this product. Prallethrin vapour can potentially irritate the airways in sensitive individuals, particularly in poorly ventilated spaces. Ensuring good ventilation significantly reduces this risk, but professional advice is recommended first.

What insects does the Jungle Formula Plug In Refill repel?

The refill is primarily designed to repel and kill mosquitoes and other flying insects indoors, such as midges and gnats. It is not intended for use against crawling insects such as ants, fleas, or cockroaches. For broader pest concerns, speak to a pest control professional.

Is it safe to use the Jungle Formula Plug In Refill around pets?

Pyrethroids, including prallethrin, are toxic to fish, birds, and reptiles, so the device should never be used in rooms where these animals are kept. Cats can also be sensitive to pyrethroids, so use with caution and ensure ventilation if cats are present. Dogs are generally less sensitive, but it is still advisable to keep the room ventilated.

What are the alternatives to the Jungle Formula Plug In Refill?

Alternatives include DEET-based topical sprays, picaridin-based lotions, and other plug-in mosquito repellent devices from brands such as Raid or Mortein. If you need protection outdoors or while travelling, a topical repellent is more appropriate than an indoor plug-in device. You can explore our travel health range for options suited to use abroad.

Can I use the Jungle Formula Plug In Refill while pregnant?

If you are pregnant or breastfeeding, you should consult your GP or pharmacist before using any insecticide product, including this refill. While ambient exposure at low concentrations in a ventilated room is generally considered low risk, individual circumstances vary. Your healthcare provider can advise on the safest approach for your situation.

Does the Jungle Formula Plug In Refill work against mosquitoes that carry disease?

The refill is effective at repelling and killing mosquitoes indoors, including species that can carry diseases such as malaria or dengue fever. However, it is an indoor product only and should not be relied upon as the sole protective measure in high-risk travel destinations. The NHS recommends combining indoor protection with topical repellents and appropriate clothing when travelling to at-risk regions.

How do I know when the Jungle Formula Plug In Refill needs replacing?

The refill bottle is typically transparent or semi-transparent, allowing you to see the liquid level. When the liquid is depleted, the device will no longer release vapour and protection will cease. Replace the refill promptly to maintain continuous coverage, especially during peak mosquito season.

Can I use the Jungle Formula Plug In Refill all night while I sleep?

Yes, the device is designed for overnight use of approximately 8 hours per session. Ensure the bedroom is slightly ventilated — a window open a few centimetres is sufficient — to prevent any build-up of vapour. Most users find overnight use the most effective way to prevent mosquito bites during sleep.

What should I do if I accidentally spill the Jungle Formula Plug In Refill liquid?

If you spill the liquid on your skin, wash the affected area thoroughly with soap and water immediately. If it gets into your eyes, rinse with clean water for at least 15 minutes and seek medical advice. If swallowed, contact NHS 111 or go to your nearest A&E — take the product packaging with you. You may also find our first aid collection useful for managing minor skin reactions.

Are there any latest studies on pyrethroid plug-in insect repellents?

Research continues to support the effectiveness of synthetic pyrethroids such as prallethrin for indoor mosquito control, with studies confirming their efficacy in reducing mosquito populations in enclosed spaces. Regulatory bodies including the UK Health and Safety Executive (HSE) assess biocidal products like this refill for both safety and effectiveness before they can be sold. Always use the product as directed to ensure you benefit from its proven protective action.

How Should You Use the Jungle Formula Plug In Refill?

Using the Jungle Formula Plug In Refill correctly is straightforward, but it is important to follow each step carefully to ensure both effectiveness and safety. Always read the full product label before use, and make sure you are using the refill with the compatible Jungle Formula plug-in device.

Follow these steps each time you fit a new refill:

What Is the Correct Dose of the Jungle Formula Plug In Refill?

This product is not a medicine taken by mouth — it works by releasing vapour into the room, so there is no dose to measure yourself. The device controls the rate of vapour release automatically. One refill is intended for use with one device at a time.

The table below summarises recommended usage by age group and situation:

When Is the Best Time to Use the Jungle Formula Plug In Refill?

Mosquitoes are most active during the evening and overnight hours, which makes this the ideal time to run the plug-in device. Switch it on approximately 15 to 30 minutes before you plan to be in the room or go to sleep, allowing the vapour to build up to an effective concentration. This is especially important during summer months or in the days following travel to a mosquito-prone region.

You do not need to run the device continuously throughout the day if mosquito activity is low. Using it selectively during peak mosquito hours will also help extend the life of each refill.

How Long Can You Use the Jungle Formula Plug In Refill For?

Each refill lasts up to 45 nights at approximately 8 hours of use per night. Once the liquid is depleted, simply replace it with a new refill — there is no limit on how long you can continue using the device itself, provided it remains in good working order. Many households use plug-in insect repellent devices throughout the entire summer season and beyond.

If you notice the device is no longer effective or the liquid appears to have run out before the expected 45 nights, check that the device is functioning correctly and that the refill is properly seated. Replace the refill as needed to maintain continuous protection.

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 the Jungle Formula Plug In Refill?

When used as directed in a well-ventilated room, most people do not experience any side effects from the Jungle Formula Plug In Refill. The concentration of prallethrin vapour released at normal usage levels is low and generally well tolerated. However, some individuals — particularly those with pre-existing sensitivities — may notice mild reactions.

  • Mild throat irritation or a tickling sensation in the nose
  • Watery or slightly irritated eyes
  • Mild headache, particularly if the room is poorly ventilated
  • A faint chemical odour that some people find unpleasant

What Are the Less Common Side Effects of the Jungle Formula Plug In Refill?

Less commonly, some users may experience more noticeable reactions, especially if the device is used in a very small or sealed room, or if the individual has a known sensitivity to pyrethroid insecticides. These reactions are uncommon at normal usage concentrations but are worth being aware of.

  • Skin irritation or redness if the liquid comes into direct contact with skin
  • Worsening of asthma or breathing difficulties in susceptible individuals
  • Dizziness or light-headedness in very poorly ventilated spaces
  • Nausea if exposed to high concentrations over a prolonged period

What Are the Serious Side Effects of the Jungle Formula Plug In Refill?

Serious side effects are rare when the product is used correctly. However, if the liquid is accidentally ingested or comes into contact with the eyes, this requires prompt medical attention. Swallowing prallethrin liquid can cause nausea, vomiting, and in larger amounts, neurological symptoms. Eye contact can cause significant irritation and temporary visual disturbance.

If you or someone else swallows any of the liquid, call NHS 111 immediately or go to your nearest A&E, taking the product packaging with you. If the liquid enters the eyes, rinse with clean running water for at least 15 minutes and seek medical advice promptly.

What Should You Do If You Experience Side Effects?

If you notice any mild side effects such as throat irritation or watery eyes, switch off the device and open windows and doors to ventilate the room fully. Symptoms should resolve quickly once exposure to the vapour ceases. If symptoms persist or worsen after ventilating the room, seek medical advice from your GP or by calling NHS 111.

Do not continue using the device in the same room if you or anyone present is experiencing respiratory discomfort. Consider using the device in a different room or switching to an alternative form of insect protection, such as a topical repellent.

Can the Jungle Formula Plug In Refill Interact With Other Products?

No significant interactions with medicines are known for ambient prallethrin vapour at the concentrations released by this device. However, you should avoid using multiple insecticide devices simultaneously in the same small room, as this could increase vapour concentration beyond recommended levels. Prallethrin is highly toxic to fish, birds, reptiles, and cats — never use the device in rooms where these animals are present, and keep the liquid away from aquariums or animal enclosures at all times.

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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