Frequently asked questions
What is NEXGARD SPECTRA?

NEXGARD SPECTRA provides the MOST complete protection against fleas, ticks, heartworm and intestinal worms, in one monthly, beef-flavoured chew.

See product label for full claim details and usage instructions.

How does NEXGARD SPECTRA differ from NEXGARD?

NEXGARD contains the active ingredient afoxolaner which has been proven to kill both fleas and ticks and to protect your dog for a whole month.

See NEXGARD product label for full claim details and usage instructions.

Like NEXGARD, NEXGARD SPECTRA contains afoxolaner, providing the same excellent level of protection against fleas and ticks. Additionally, NEXGARD SPECTRA contains the active ingredient milbemycin oxime, which provides protection against heartworm and intestinal worms, making it the most complete protection against fleas, ticks, heartworm and intestinal worms in just one tasty chew.

See NEXGARD SPECTRA product label for full claim details and usage instructions.

How long does NEXGARD SPECTRA protect my dog from fleas and ticks?

NEXGARD SPECTRA will protect your dog from fleas and the most problematic tick species infesting dogs in Australia (Brown Dog tick, Bush tick and the deadly Paralysis tick) for a full month.

See product label for full claim details and usage instructions.

How does NEXGARD SPECTRA kill fleas?

NEXGARD SPECTRA kills fleas by over-stimulating their nervous system resulting in hyperexcitation and death. Following administration, fleas are killed within 6–8 hours. The rapid onset of action kills newly acquired fleas before they can lay eggs. Monthly use is recommended to combat reinfestation and prevent further contamination of the environment with eggs. Click here for more information on how to control a flea infestation in your home.

Why may I see more fleas on my pet after administering NEXGARD SPECTRA?

As NEXGARD SPECTRA over-stimulates the flea’s nervous system resulting in hyper-excitation, you may see fleas rise to the top of your dog’s coat and appear more visible as they die.

Is NEXGARD SPECTRA effective when heavy flea infestations exist?

Yes, NEXGARD SPECTRA kills fleas rapidly before they lay eggs, therefore preventing further infestation of the environment. If a moderate to heavy environmental infestation exists, fleas can continue to emerge into the surroundings for weeks to months because of the continuing development of flea eggs, larvae and pupae already present at the time of treatment, a phenomenon known as 're-emergence'. It may therefore take more than one monthly treatment to achieve control of moderate to heavy flea infestations.

In areas where fleas are common year-round, monthly treatment with NEXGARD SPECTRA should continue throughout the year without interruption. To minimise the likelihood of flea re-infestation, it is important to treat all animals within a household with an approved flea control product.

Click here for more information on how to control a flea infestation in your home.

See product label for full claim details and usage instructions.

My dog has flea allergy dermatitis (FAD). Does NEXGARD SPECTRA help to control this?

NEXGARD SPECTRA is an ideal choice for dogs with flea allergy dermatitis (FAD) due to its rapid speed of kill and month long efficacy.

For dogs with a flea allergy, monthly treatment with NEXGARD SPECTRA should continue throughout the year without interruption. To minimise the likelihood of flea re-infestation, it is important to treat all animals within a household with an approved flea control product.

Click here for more information on how to control a flea infestation in your home.

See product label for full claim details and usage instructions.

Which species of tick does NEXGARD SPECTRA kill?

NEXGARD SPECTRA is highly effective at killing the most problematic tick species infesting dogs in Australia – Brown Dog tick, Bush tick and the deadly Paralysis tick.

See product label for full claim details and usage instructions.

Why can I see dead ticks on my dog after using NEXGARD SPECTRA?

A dead tick’s mouthparts may remain anchored in your dog’s skin, however the dead tick can be easily removed using a tick removal device, tweezers, or your fingers.

If you’re confident to remove the dead tick yourself, using your fingers or tweezers, grab the tick adjacent to your pet’s skin (at the tick mouthparts), twist the tick and then pluck the tick away from the skin.

Is NEXGARD SPECTRA effective at preventing heartworm disease?

Monthly administration of NEXGARD SPECTRA has been shown to be 100% effective at preventing heartworm disease in dogs.

See product label for full claim details and usage instructions.

If my dog is already on a heartworm preventative, how do I switch from my current heartworm preventative to NEXGARD SPECTRA?

Your dog’s first dose of NEXGARD SPECTRA must be administered on, or before, the next due date of the current heartworm preventative. This will avoid any break in heartworm prevention.

If your dog’s heartworm prevention has lapsed, speak to your veterinarian.

See product label for full claim details and usage instructions.

Can NEXGARD SPECTRA be given to dogs with an unknown heartworm status?

The use of NEXGARD SPECTRA in heartworm positive dogs has not been evaluated. As with all heartworm prevention programs, dogs with an unknown heartworm status should be tested by a veterinarian for pre-existing adult heartworm infestation prior to starting a heartworm preventative.

See product label for full claim details and usage instructions.

Is NEXGARD SPECTRA effective against intestinal worms?

NEXGARD SPECTRA treats and controls roundworm, hookworm and whipworm in dogs.

See product label for full claim details and usage instructions.

How do I dose my dog with NEXGARD SPECTRA?

NEXGARD SPECTRA is a soft beef-flavoured chew that is for oral consumption only. For ease of dosing, NEXGARD SPECTRA can be given with or without food. Remove only one chewable at a time from the foil-backed blister card. NEXGARD SPECTRA is a highly palatable chew that is readily consumed by dogs when offered as a treat. Alternatively, it can also be broken into pieces and fed to your dog in a small amount of dog food.

See product label for full claim details and usage instructions.

What do the NEXGARD SPECTRA chews look like?

The NEXGARD SPECTRA chews are mottled red to reddish brown, circular (2–3.5 kg chew) or rectangular shaped (3.6–7.5 kg chew; 7.6–15 kg chew; 15.1–30 kg chew; 30.1–60 kg chew).

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How do I know my dog will like NEXGARD SPECTRA?

NEXGARD SPECTRA is a tasty beef-flavoured chew that dogs love! At the end of a 3 month Australian study, 100% of owners reported that NEXGARD SPECTRA was well received by their dog.

See product label for full claim details and usage instructions.

Does NEXGARD SPECTRA need to be given with food?

Unlike some treatments, NEXGARD SPECTRA does not need to be given with food. You can choose to give the chew to your dog any time that suits you, with or without food.

See product label for full claim details and usage instructions.

Should I watch my dog to ensure that it has completely consumed the chew?

As with all medications, care should be taken to ensure that your dog consumes the complete chew and treated dogs should be observed for a few minutes after administration to ensure that no part of the chew is lost or rejected. If it is suspected that any of the chew has been lost, treat again with another full chew.

See product label for full claim details and usage instructions.

What age can NEXGARD SPECTRA be used from?

Congratulations on your growing family! NEXGARD SPECTRA can be given to your puppy from just 8 weeks of age, providing they weigh at least 2 kg.

See product label for full claim details and usage instructions.

Can I administer NEXGARD SPECTRA more than once a month?

NEXGARD SPECTRA has been shown to provide effective protection for a complete month: it is not required or necessary to treat more frequently than this. To ensure your dog is always protected, aim to dose your dog on the same day every month. Our 3 and 6 month protection packs come with a sheet of handy reminder stickers, use them in diaries or calendars to help you remember. Otherwise, set yourself a monthly reminder on your phone.

See product label for full claim details and usage instructions.

What kind of dogs can NEXGARD SPECTRA be given to?

NEXGARD SPECTRA can be given to puppies from just 8 weeks of age, providing they weigh at least 2 kg.

NEXGARD SPECTRA was well tolerated in field studies in over 100 different pure breeds and a wide range of cross breeds, including Collies and Shepherd breeds, which have been shown to be particularly sensitive to some drugs due to mutations in their ABCB1 (MDR1) genes.

Afoxolaner, one of the two active ingredients in NEXGARD SPECTRA, is part of the isoxazoline family of chemicals. Adverse reactions to this family of chemicals are rarely observed but may include vomiting, diarrhoea, lethargy, inappetence (loss of appetite), itching and very rarely, seizures. Most adverse reactions are self-limiting and of short duration.

Use with caution in dogs with a history of epilepsy or any other seizure disorder.

If you have any concerns, please speak to your veterinarian.

See product label for full claim details and usage instructions.

Can a NEXGARD SPECTRA chew be split so I can dose more than one dog?

No. You’ve made the right choice in selecting NEXGARD SPECTRA to protect your dog. Don’t risk under-dosing them. In order to ensure your dog receives the correct dose and complete protection against fleas, ticks, heartworm and intestinal worms for a full month they must consume the entire chew for their weight.

See product label for full claim details and usage instructions.

How long after administering NEXGARD SPECTRA can my dog be bathed or go swimming?

NEXGARD SPECTRA is not affected by bathing, swimming or shampooing – unlike some topical formulations or collars. You can be confident that your dog can exercise, play on furniture or with children straight after dosing!

See product label for full claim details and usage instructions.

Can NEXGARD SPECTRA be administered to dogs with food allergies?

NEXGARD SPECTRA is a vegetable-based chew with soy proteins. It does not contain animal meat protein, including the beef flavouring, and is gluten free. Use with caution in dogs with a known hypersensitivity to soy.

Can NEXGARD SPECTRA be administered to cats or other pets?

No. NEXGARD SPECTRA must only be used for dogs.

See product label for full claim details and usage instructions.

My dog is less than 2 kg, can I use NEXGARD SPECTRA?

No. The use of NEXGARD SPECTRA in dogs under 2 kg, or less than 8 weeks of age, has not been evaluated.

See product label for full claim details and usage instructions.

What are my options if my dog is pregnant or lactating?

The use of NEXGARD SPECTRA has not been evaluated in breeding, pregnant or lactating dogs. Consult your veterinarian for advice on suitable treatment options.

See product label for full claim details and usage instructions.

Can I use NEXGARD SPECTRA if my dog is on other medications?

Specific studies investigating the concurrent use of NEXGARD SPECTRA with other medications have not been conducted. However, in field studies, NEXGARD SPECTRA was well tolerated by dogs receiving a wide variety of concurrent medications, including anaesthetics, pain-killers, dewormers, antibiotics, cardiac medications, diuretics, anti-inflammatories, sedatives, topical parasiticides and vaccines.

There are no specific warnings or contraindications on the product label regarding the use of NEXGARD SPECTRA with any other medications.

If you have any concerns, please speak to your veterinarian.

See product label for full claim details and usage instructions.

What pack sizes and weight ranges is NEXGARD SPECTRA available in?

There’s a NEXGARD SPECTRA to suit dogs of all sizes.

Very Small Dog
Very small dog
2 — 3.5 kg
Small Dog
Small dog
3.6 — 7.5 kg
Medium Dog
Medium dog
7.6 — 15 kg
Large Dog
Large dog
15.1 — 30 kg
Very Large Dog
Very large dog
30.1 — 60 kg
How do I dose a dog that weighs more than 60 kg with NEXGARD SPECTRA?

For dogs >60 kg, administer an appropriate combination of chewables, e.g. for a 75 kg dog, administer one 30.1–60 kg chew together with one 7.6–15 kg chew.

See product label for full claim details and usage instructions.

Where can I purchase NEXGARD SPECTRA?
NEXGARD SPECTRA can be purchased at all leading vet clinics and pet stores.
What side effects may I see?

NEXGARD SPECTRA has been shown to be safe in various breeds of dogs (including Collie breeds) and in puppies 8 weeks and older. Afoxolaner, one of the two active ingredients in NEXGARD SPECTRA, is part of the isoxazoline family of chemicals. Adverse reactions to this family of chemicals are rarely observed but may include vomiting, diarrhoea, lethargy, inappetence (loss of appetite), itching and very rarely, seizures. Most adverse reactions are self-limiting and of short duration.

Use with caution in dogs with a history of epilepsy or any other seizure disorder.

If you have any concerns, please speak to your veterinarian.

See product label for full claim details and usage instructions.

What should I do if my dog experiences an unexpected reaction after taking NEXGARD SPECTRA?

If you believe your dog has reacted unexpectedly following ingestion of NEXGARD SPECTRA please speak to your veterinarian or contact Boehringer Ingelheim Animal Health Customer Care on 1800 808 691.

Adverse reactions are rarely observed, generally self-limiting and of short duration. In clinical studies, no serious adverse reactions were observed following the administration of NEXGARD SPECTRA.

See product label for full claim details and usage instructions.

Why doesn’t NEXGARD SPECTRA cover tapeworms?

Unfortunately the active ingredient used to control tapeworms (praziquantel) is bitter and may have compromised palatability and reduced compliance.

Which tapeworms could be a potential risk to my dog?

Two problematic tapeworm species found in Australian domesticated dogs are the flea tapeworm and hydatid tapeworm. The prevalence of both these tapeworms has been shown to be low.

If you believe your dog has a high risk of exposure, particularly to hydatid tapeworm, please speak to your veterinarian.

How can I reduce the risk of flea tapeworm?

While the prevalence of flea tapeworm in dogs in Australia is low, effective flea control has been shown to reduce the likelihood of flea tapeworm infection.

How can I reduce the risk of hydatid tapeworm?

Avoid feeding offal and raw meat to dogs and prevent access to dead livestock and wildlife.

If hydatid tapeworm is of concern in your area, contact your veterinarian to discuss appropriate tapeworm prevention.

What if a dog consumes multiple NEXGARD SPECTRA chewables?

While safety studies demonstrated Nexgard Spectra was well tolerated in dogs at up to 5 x the recommended maximum dose, if your dog consumes multiple NEXGARD SPECTRA chewables, please contact your veterinarian.

Can NEXGARD SPECTRA be safely administered to dogs with epilepsy?

Use with caution in dogs with a history of epilepsy or any other seizure disorder.

Afoxolaner is a member of the isoxazoline family of chemicals. Adverse reactions to this family may, vary rarely, include seizures.

Specific studies with NEXGARD SPECTRA have not been conducted in dogs with epilepsy, and therefore any potential effect of treatment on seizure frequency is unknown.

Is ingestion of NEXGARD SPECTRA harmful to cats?

Nexgard Spectra is not registered in cats and its safety in cats has not been evaluated. If your cat does ingest NEXGARD SPECTRA, please contact your veterinarian.

Is NEXGARD SPECTRA harmful to humans if accidently ingested?

NEXGARD SPECTRA may cause gastrointestinal disturbances if ingested.

In case of accidental ingestion, particularly in the case of children, seek medical advice immediately and provide the product label to the doctor.

Alternatively contact the Poisons Information Hotline on 13 11 26.

See product label for user safety directions.

To reduce the risk of accidental ingestion, keep out of reach of children, remove only one chewable at a time from the foil-backed blister card and administer to the dog immediately after removal from the packaging.

Any suspected human adverse events should be reported, regardless of the time frame, to Boehringer Ingelheim Animal Health Customer Care on 1800 808 691.

Should I wash my hands after handling NEXGARD SPECTRA?

Yes, always wash your hands after handling.

How should I dispose of the packaging?

The foil-backed blister pack should be wrapped in paper and placed in the garbage. The outer carton can be recycled.

What are the active ingredients in NEXGARD SPECTRA?

There are two active ingredients in NEXGARD SPECTRA:

  • Afoxolaner
  • Milbemycin oxime
What is afoxolaner and how does it work?

Afoxolaner is an insecticide and acaricide of the isoxazoline family. Afoxolaner selectively binds to insect and acarine GABA-gated and glutamate-gated chloride channels, blocking pre- and post-synaptic transfer of chloride ions across cell membranes. Prolonged afoxolaner-induced hyperexcitation results in uncontrolled activity of the central nervous system and death of insects and acarines.

Isoxazolines, among the chloride channel modulators, bind to a distinct and unique target site within the channel.

What is milbemycin oxime and how does it work?

Milbemycin oxime is an antiparasitic endectocide belonging to the group of macrocyclic lactones. It is a fermentation product of Streptomyces milbemycinicus and comprises a mixture of two homologues, A3 (20%) and A4 (80%).

Milbemycin oxime activates GABA-gated and glutamate-gated chloride channels in invertebrate neurons and pharyngeal muscle cells. Increased permeability of the cell membrane to chloride ions causes hyperpolarisation of the neuromuscular membrane resulting in paralysis and death of the parasite.

Can NEXGARD SPECTRA be given to heartworm positive dogs?

No, use of NEXGARD SPECTRA in heartworm positive dogs has not been evaluated. For further information, speak to your veterinarian.

Can NEXGARD SPECTRA be administered after the listed expiration date?

Boehringer Ingelheim Animal Health does not recommend the administration of NEXGARD SPECTRA beyond the labelled expiration date.