NexGard Spectra®
Did someone say parasites?

Did someone say parasites?

 

I hate them!

 

parasites

Did you know?

‘Parasites’ is a term that describes tiny creatures that can live on or inside your dog, causing harm to your pet and potentially your family. These include fleas, ticks, lungworm and roundworm, all of which are common in dogs.

NexGard SPECTRA® is a monthly, tasty chew that will protect your dog from these key parasites*:

dog parasites

AFOXOLANER

  • Flea

    Eliminates
    fleas

  • ticks

    Terminates
    ticks

  • Mites

    Manages
    mites†

MILBEMYCIN OXIME

  • Controls
    roundworm

    Roundworm

  • Prevents
    lungworm
    disease

    Lungworm disease

Also covers

  • Hookworm
  • Whipworm
  • Heartworm
  • Eyeworm
  • Ear mites

Dogs are at risk of parasites. Some we can see.
Some we can’t.

Some can be deadly to your dog and harmful for your family too. Take a look at the risks they pose…
 

Watch the video to find out more.

video

Fleas

Flea
Did you know?

Fleas can cause itching and skin disease and are a common, year-round problem1

Find out more about fleas >

Fleas are a threat to your dog all year round

Fleas

Fleas are very common in dogs and can be a real menace. These parasites can be found in the environment, hidden in places such as warm, carpeted houses, and outdoor shady areas such as patios, decking and flower beds.

For every 5 fleas seen, there are 95 flea eggs, larvae or pupae hiding in the home or garden.1

Dogs pick up fleas when these young parasites emerge from cocoons and jump onto them. Fleas can cause a skin allergy in dogs and transmit tapeworms.

Controlling fleas throughout the year is the best way to stop this happening.

  1. Halos L, et al. Flea control failure? Myths and realities. Trends Parasitol 2014. 30(5), 228–233.

Ticks

Tick
Did you know?

Ticks can transmit serious infections (such as Lyme disease) and can be found on 1 in 3 dogs2,3

Find out more about ticks >

Don’t ignore the danger posed by ticks

Ticks

Ticks are often found on dogs across the UK,1 living in grass and vegetation. Dogs can pick up ticks when they walk in an infested area. These parasites can attach to the skin of your dog and feed on its blood.

Ticks can transmit dangerous diseases2 – which may cause fever and organ damage – to both your dog and family.

For example, Lyme disease and babesiosis (which can be fatal) may be transmitted by ticks.2

Using a product to kill ticks quickly will reduce the risk of these diseases being transmitted.3

  1. Abdullah S, et al. Ticks infesting domestic dogs in the UK: a large-scale surveillance programme. Parasit Vectors 2016. 9(1), 391.
  2. Wright I. Lyme disease: If you go down to the woods today are you in for a big surprise? Companion Animal 2012. 17(6), 42–44.
  3. Wright I. What do dog owners need from tick protection? Vet Times 2018. 48(41), 10–11.

Lungworm

Lungworm
Did you know?

Lungworm disease can be deadly and can be picked up by swallowing slugs and snails4

Find out more about lungworm >

Lungworm can be deadly

Lungworms

Lungworm are steadily on the rise throughout the UK and Ireland.1-4

Dogs can pick these parasites up when they are exposed to infected slugs and snails, or even just by drinking contaminated water.1 Lungworm can live in dogs’ hearts and the major blood vessels supplying the lungs.

Lungworm can cause coughing, bleeding, and heart and lung disease, and can sadly even be fatal.

To prevent lungworm disease, dogs need protection using a suitable product every month.5

  1. Morgan E. Lungworm in dogs: a local or national problem? Vet Times 2018. 48(44), 16–17.
  2. McCarthy G, et al. Geographical distribution of Angiostrongylus vasorum in foxes (Vulpes vulpes) in the Republic of Ireland. Parasitology 2016. 143(5), 588–593.
  3. Morgan ER, et al. Angiostrongylus vasorum and Eucoleus aerophilus in foxes (Vulpes vulpes) in Great Britain. Vet Parasitol 2008. 154(1-2), 48–57.4.
  4. Taylor CS, et al. Increased prevalence and geographic spread of the cardiopulmonary nematode Angiostrongylus vasorum in fox populations in Great Britain. Parasitology 2015. 142(9), 1190–1195.
  5. ESCCAP. Worm Control in Dogs and Cats. ESCCAP Guideline 01. Seventh edition, 2025.

Roundworms

Roundworms
Did you know?

Roundworm can be passed from your dog to your family and are associated with major health concerns including asthma, epilepsy, blindness and reduced learning ability5-8

Find out more about roundworms >

The risk from roundworm is very real

Roundworms

Roundworm are another parasite very commonly found in dogs – especially puppies.1

Roundworm can be found in the soil, vegetation and poo of infected dogs and they may also be passed on to puppies from their mother.

Roundworm eggs can live in the environment for years and can infect people, with children being especially at risk due to their inquisitive nature.2

Roundworm exposure in humans is associated with major health concerns including asthma, epilepsy, blindness and reduced learning ability.3-6

To stop eggs being laid and passed on, roundworm prevention needs to be given every month.7

  1. Schwartz R, et al. The epidemiology and control of Toxocara canis in puppies, Parasite Epidemiology and Control, Volume 16, 2022.
  2. Overgaauw PA, van Knapen F. Veterinary and public health aspects of Toxocara spp. Vet Parasitol 2013. 193(4), 398–403.
  3. Li L, et al. Asthma and toxocariasis. Ann Allergy Asthma Immunol 2014. 113(2), 187–192.
  4. Quattrocchi G, et al. Toxocariasis and epilepsy: systematic review and meta-analysis. PLoS Negl Trop Dis 2012. 6(8), e1775.5.
  5. Walsh MG, Haseeb MA. Reduced cognitive function in children with toxocariasis in a nationally representative sample of the United States. Int J Parasitol 2012. 42(13-14), 1159–1163.
  6. Overgaauw PA. and van Knapen F. Veterinary and public health aspects of Toxocara spp. Vet Parasitol 2013. 193(4), 398–403.
  7. ESCCAP. Worm Control in Dogs and Cats. ESCCAP Guideline 01. Seventh edition, 2025.

Dogs love NexGard SPECTRA ® too

Video cover

For more information, read the full owner brochure

Download a pdf version

* NexGard SPECTRA® also covers heartworm, hookworm, whipworm and eyeworm. NexGard SPECTRA® mite indication is for treatment of sarcoptic mange, demodicosis and otodectes cynotis. NexGard SPECTRA® does not cover tapeworms. Chewable tablets FOR DOGS from 8 weeks of age and weighing at least 2 kg.
† Otodectes cynotis.
‡ The safety of the veterinary medicinal product has not been established in breeding males. In breeding males, use only according to the benefit-risk assessment by the responsible veterinarian.

References

  1. Halos, L. et al. (2014) Flea control failure? Myths and realities. Trends Parasitol. 30(5), 228-233.
  2. Wright, I. (2012) Lyme disease: If you go down to the woods today are you in for a big surprise? Companion Animal. 17(6), 42-44.
  3. Abdullah, S. Helps, C. Tasker, S. et al. Ticks infesting domestic dogs in the UK: a large-scale surveillance programme. Parasites & Vectors. 2016;9:391.
  4. Helm, J. and Morgan, E. (2017) Canine and feline lungworm infections in the UK. In Practice. 39(7), 298-315.
  5. Li, L. et al. (2014) Asthma and toxocariasis. Ann Allergy Asthma Immunol. 113(2), 187-192.
  6. Quattrocchi, G. et al. (2012) Toxocariasis and epilepsy: systematic review and meta-analysis. PLoS Negl Trop Dis. 6(8), e1775.7.
  7. Walsh, M.G. and Haseeb, M.A. (2012) Reduced cognitive function in children with toxocariasis in a nationally representative sample of the United States. Int J Parasitol. 42(13-14), 1159-1163.
  8. Overgaauw, P.A. and van Knapen, F. (2013) Veterinary and public health aspects of Toxocara spp. Vet Parasitol. 193(4), 398-403.

NexGard SPECTRA® contains afoxolaner and milbemycin oxime. UK: POM-V IE: POM.  Further information available in the SPC or from Boehringer Ingelheim Animal Health UK Ltd., RG12 8YS, UK. UK Tel: 01344 746959 (sales) or 01344 746957 (technical). IE Tel: 01 291 3985 (all queries). Email: vetenquiries@boehringer-ingelheim.com. NexGard SPECTRA® is a registered trademark of Boehringer Ingelheim Animal Health France SCS, used under licence. ©2026 Boehringer Ingelheim Animal Health UK Ltd. All rights reserved. Date of preparation: Feb 2026. UI-PET-0373-2025. Use Medicines Responsibly.  
Prescription decisions are for the person issuing the prescription alone.