Nexgard Spectra for Dogs, The Ultimate 2024 Guide

By the Easy Protect team!

If you're an Aussie dog owner or running around after a new puppy : ) Then you'll have heard of NexGard Spectra and have likely seen the product advertised in your local Vet clinic.

Nexgard Spectra is a parasite-prevention product famous for protecting against fleas, ticks and worms. Spectra saves hundreds of thousands of Aussie dogs' lives each year - especially when it comes to paralysis ticks, and heartworm.

What is Nexgard Spectra for dogs?

In Australia, Nexgard Spectra is paws-down the top-selling product for parasite prevention in a simple monthly chew. It protects against fleas, ticks (including paralysis ticks) and worms including deadly heartworm.

NexGard Spectra is manufactured by a German company called Boehringer Ingelheim. Being a German company, the manufacturing quality and research behind the product is unparalleled - and partly why millions of dogs in Australia are protected by it.

It's also the product we deliver with Easy Protect that makes Spectra even easier (so you never forget it or run out:)

Can Nexgard Spectra be given to puppies?

Yes, NexGard Spectra can be given to puppies over 8 weeks of age and over 2kg.

However, while most people will pop down to their local pet store and give their dog Spectra, we (including our in-house Vet, Dr Tegan) believe it is a MUST to consult your own Veterinarian first.

Like humans, every dog is different, and your Veterinary advice will consider your puppy's age, weight, overall health, and other medications and provide guidance on when to start using NexGard Spectra and how to administer it safely. Only your Vet should do this - no one else.

We'd go even further to say that you should always try any new medication under your Vet's guidance. Your Vet should have a single dose of Nexgard Spectra that they can administer under supervision.

Saying all that, NexGard Spectra is the most popular choice among Veterinarians for parasite protection, that's why we deliver it monthly when you need it!

Easy protect delivers Nexgard Spectra to puppies all over Australia!

What's the advantage of Nexgard Spectra over other treatments?

Nexgard Spectra is Australia's leading treatment for a reason. It provides constant protection and superior protection against fleas, ticks and worms in an easy oral treatment. It's a tasty beef-flavoured chew.

In short, Nexgard Spectra covers the deadliest Aussie parasites with one simple monthly dose.

Unlike spot-on treatments or products like flea collars, where even simple things like rain or a bath can jeopardise the entire purpose, Nexgard Spectra provides rapid protection and makes extensive protection easy each month.

What does Nexgard Spectra cover?

The best thing about Nexgard Spectra is that it covers the major Aussie parasites (listed below). This includes common parasites like fleas, ticks and worms.

For most dogs, Nexgard Spectra is ideal for daily health and protection - East Coast, West Coast and rural Aussie areas.

As Aussies, our dogs are at risk of some of the nastiest parasites on the planet, including deadly paralysis ticks and heartworms - which, from our team's estimations, result in over 1,000 dogs a week into severe conditions at Vet clinics.

Below are the key parasites that Nexgard Spectra covers:

  1. Fleas: NexGard Spectra is highly effective at killing fleas and preventing flea allergy dermatitis

    . It starts working within hours of administration on adult fleas, and continues to provide protection for a full month to also prevent flea tapeworm. In essence, Nexgard Spectra helps with the prevention of flea outbreaks in dogs.

  2. Ticks: This medication also protects dogs against ticks, including paralysis ticks (Ixodes holocyclus). Tick paralysis can be a significant concern for dogs, particularly in certain regions of the world, and NexGard Spectra helps prevent tick infestations. The

    control of paralysis tick is one of the reasons Nexgard Spectra is so popular in Australia, this is one of our most deadly parasites for all kinds of wildlife.

  3. Intestinal Worms: NexGard Spectra protects against various intestinal worms, including:

    • Roundworms (Toxocara canis and Toxascaris leonina)

    • Hookworms (Ancylostoma caninum and Ancylostoma braziliense)

    • Whipworms (Trichuris vulpis)

  4. Heartworms: NexGard Spectra also prevents heartworm disease in dogs. It contains an active ingredient (Milbemycin Oxime) that kills heartworm larvae (microfilariae) and prevents the development of heartworm disease when administered monthly. Heartworm disease can be life-threatening, so prevention is crucial.

For most Australian dogs, this level of coverage is ideal, all in an easy-to-administer tasty chew. Nexgard Spectra keeps your dog healthy and away from Vet clinics! Studies indicate that Nexgard Spectra also covers common mites like demodex mites, mite roundworm and controls ear mites, but that is not what this famous monthly application or chew is most commonly used for.


How do I choose the right Nexgard Spectra weight?

Nexgard Spectra comes in 5 weights and should be matched to cover your dog's weight class.

If you are unsure of your dog's weight, it's easy to work it out. Pick up your dog and weigh both of you. Then, put your dog down and weigh yourself. Remove your weight from the total - and you have your dog's weight.

For example, if you and your dog weigh 100kg together and you weigh 75kg alone, then your dog is 25kg!

Another reason to try Easy Protect, the monthly auto delivery, is that you can also log in anytime and update your dog's weight, which is perfect for puppies too you won't have an entire 6 pack that is the wrong weight as they grow. Likewise, if you have two dogs of different sizes, we send both size treatments, so you don't have to worry.

Easy Protect also ensure you get the correct pack sizes, as it is often easy to mix and match when you have two dogs are different sizes. Likewise, getting both of your dog's Nexgard Spectra in one simple monthly pack makes it one of the best online prices available!


Here are the different sizes of Nexgard Spectra treatments:

Below are the different sized Nexgard Spectra treatments, that can be administers from 8 weeks of age. Like always, follow veterinary advice and read the product label carefully if it's the first time your dog has had Nexgard Spectra. 

Nexgard Spectra Extra Small Dog and Pup, from 2 - 3.5kg

Nexgard Spectra Small Dog and Pup, from 3.6 - 7.5kg

Nexgard Spectra Medium Dog, from 7.6 - 15kg

Nexgard Spectra Large Dog, from 15.1 - 30kg

Nexgard Spectra Extra Large Dog, from 30.1 - 60kg

With Easy Protect there are no shipping costs either, we provide Free monthly delivery to anywhere in Australia, from major cities, coastal town to Tassie and the outback.

How does Nexgard Spectra work?

Although Nexgard Spectra "appears" to be a simple beef-flavoured chew, NexGard Spectra is a combination of advanced medications with two active ingredients, Afoxolaner and Milbemycin Oxime, each with a specific mode of action for the most complete parasite protection in one chew:

  1. Afoxolaner: Afoxolaner is an acaricide that primarily targets fleas and ticks so that when a flea or tick bites the dog and feeds on its blood, it ingests afoxolaner. Afoxolaner starts killing fleas within hours and continues to provide protection for an entire month.

  2. Milbemycin Oxime: Milbemycin oxime is an anthelmintic, which means it is effective against various types of internal parasites, including roundworms, hookworms, and whipworms, and it also has activity against heartworm larvae (microfilariae). This provides protection against internal parasites.

The combination of afoxolaner and milbemycin oxime is like a combination of chews in one, so that the single NexGard Spectra monthly treatment makes it a broad-spectrum coverage, targeting internal and external parasites.

How often do I give my dog Nexgard Spectra?

NexGard Spectra is a monthly treatment for dogs. To maintain your dog's protection, give them NexGard Spectra once every 30 days. Please always be sure to read the Nexgard Spectra instructions here before treating or if you are unsure.

It is essential to administer NexGard Spectra year-round to ensure its effectiveness in preventing and controlling parasites - which is where a service like Easy Protect helps out.

Skipping, forgetting doses or administering Nexgard Spectra less frequently can leave your dog vulnerable to fleas, deadly ticks and worms. If you are unsure as to how to use or administer this effective treatment, please see the Nexgard Spectra instructions here

How long does Nexgard Spectra last?

Each dose of NexGard Spectra provides 30 days of protection against fleas, ticks, intestinal worms, and heartworms after administration. This means that one chewable tablet should be given to your dog every month or 30 days to maintain continuous protection against these Aussie parasites.

It's also essential to administer NexGard Spectra every month to ensure its effectiveness in preventing parasites - it's not a one-off treatment.

Skipping doses or extending the dosing interval can leave your dog vulnerable to parasites and parasitic infestations that are highly uncomfortable for your dog and the entire family when things like a flea outbreak occur - and then can very quickly!

Learn more about fleas here: What are fleas on dogs?
And: What do fleas look like on a dog?

If you have any questions or concerns about the duration of protection or the dosing schedule for NexGard Spectra, like any treatment for your dog, please consult with your Veterinarian for guidance and always read the product label.

Can Nexgard Spectra be cut in half?

The short answer is no. Nexgard Spectra can not be cut in half - or any other portion.

NexGard Spectra, as it comes in its chewable tablet form, is designed to be administered as a whole tablet or chew. Cutting or breaking the tablet or chew into smaller pieces may alter it's effectiveness or lead to inaccurate dosing, which could reduce its efficacy in preventing and controlling harmful parasites.

To ensure that your dog receives the correct dosage and complete protection, it's best to give NexGard Spectra as a whole tablet, following the dosing recommendations.

If your dog doesn't like it (most dogs do; it's a tasty beef-flavoured chew), we'd suggest wrapping it in a bit of cheese or meat and see how they go. Just be sure to give it to them whole at all times and always read the product label.

Does Nexgard Spectra cover everything?

There are a few parasites that nexgard Spectra does not cover, namely tapeworm.

However, for most dogs this is not a problem as Nexgard Spectra provides comprehensive flea protection which can lead to tapeworm if the fleas aren't taken care of.

NexGard Spectra in essence, is a broad-spectrum parasiticide for dogs, and for most Aussie dogs, it covers everything needed to keep them safe, including:

  1. Effective Flea Treatment: NexGard Spectra is highly effective at killing fleas, providing rapid relief from infestations, and preventing future flea and flea tapeworm infestations.

  2. Effective Tick Treatment: It also protects against ticks, including paralysis ticks, which can be particularly dangerous to dogs in some areas of Australia, especially the East Coast like Sydney and Brisbane, but ever increasingly paralysis ticks are being found further south, even in Melbourne.

  3. Effective Worm Treatment: NexGard Spectra protects against various intestinal worms, including roundworms, hookworms, and whipworms.

  4. Effective Heartworm Treatment: Not too many years ago, your dog would need a yearly injection to protect against heartworm. Today, nexgard Spectra covers this and prevents heartworm disease by killing heartworm larvae called microfilariae, and prevents the development of heartworm disease when administered monthly.

Nexgard Spectra is ideal for covering Australia's most deadliest parasites.

Let's dive into these parasites a little more:

Does Nexgard Spectra cover fleas?

Yes, NexGard Spectra effectively protects against fleas at all cycles in dogs, and it starts to work within hours. NexGard Spectra continues to provide protection against fleas for an entire month through all flea cycles, from lavee to adult. You can learn more about fleas here with What are Fleas.

Does Nexgard Spectra cover ticks?

Yes, NexGard Spectra provides protection against ticks in dogs, including bush ticks and brown dog ticks, plus the deadly paralysis ticks (Ixodes holocyclus). Ticks can transmit diseases to dogs, so tick control is essential to protect your dog's health. NexGard Spectra begins killing ticks within hours of contact and continues to protect against ticks for a whole month.

Does Nexgard Spectra cover paralysis ticks?

Yes, NexGard Spectra effectively protects against paralysis ticks in dogs. Paralysis ticks are a significant concern, especially in Australia, where they can transmit toxins that lead to paralysis and eventually an unfortunate - and painful death in dogs. If you've ever lost a dog to paralysis ticks, you'll know that paralysis tick prevention is everything for your dog's safety and health.

Does Nexgard Spectra kill worms?

Yes, NexGard Spectra is a monthly chewable treatment that effectively kills and controls various intestinal worms in dogs. It contains the active ingredient Milbemycin Oxime, which is an anthelmintic that targets several types of intestinal parasites, including taking care of roundworms (Toxocara canis and Toxascaris leonina), Hookworms (Ancylostoma caninum and Ancylostoma braziliense) and Whipworms (Trichuris vulpis).

Does Nexgard Spectra cover mites and mange?

NexGard Spectra is primarily designed to control fleas, ticks, intestinal worms, and heartworms in dogs. It is not specifically formulated to treat mange, a skin condition caused by mites. If you suspect that your dog has mange or mites, it's essential to consult with a veterinarian for a proper diagnosis and treatment plan.

What does Nexgard Spectra not cover?

While NexGard Spectra covers a broad spectrum of parasites in a single tasty chew, it may not protect against all potential parasites your dog could encounter. For example, it does not specifically target mites or tapeworms, which for most dogs is fine, and these parasites can be treated as a once-off if your dog gets them.

Of course, if you have any specific concerns or risks in your area, your Veterinarian may recommend additional or alternative parasite control treatments. For most dogs, NexGard Spectra Flea, Tick & Worming protection is sufficient. You just need to remember it each month or get a service like Easy Protect!

Is a prescription for Nexgard Spectra in Australia needed?

No, Nexgard Spectra is an over-the-counter treatment that anyone can buy in Australia.

Saying that, we always recommend consulting your Veterinarian before treating your dog with Nexgard Spectra or any other animal treatment for pets - especially if it is their first time.


Is Nexgard Spectra safe for pregnant dogs?

When it comes to using NexGard Spectra or any medication in pregnant dogs, it's essential to exercise caution and consult your local Veterinarian at all times.

Pregnant dogs have unique health considerations, and a veterinarian should carefully evaluate the use of medications during pregnancy.

The safety of NexGard Spectra (or any other medications) during pregnancy may depend on various factors, including the dog's gestational stage, overall health, and the specific risks of parasitic infections in the region.

In some cases, veterinarians may recommend alternative parasite prevention methods for pregnant dogs, especially during the early stages of pregnancy when the developing puppies may be more vulnerable to potential side effects of medications.

If you have a pregnant dog or are planning to breed it and are concerned about parasite prevention, it's crucial to discuss it with your Veterinarian. They can assess your dog's situation and guide you to the most appropriate and safe parasite control options during pregnancy.

Where to buy Nexgard Spectra online?


If you want the convenience of buying online, try Easy Protect with Australia-wide free shipping!

We're a monthly online Nexgard Spectra delivery, and we make Nexgard Spectra super easy and affordable - delivering to thousands of Aussie homes that love the service.

Australia's cheapest
& easiest Spectra!

Australia's cheapest
& easiest Spectra!

About the Author, Dr. Tegan and our petcare team.

Over 1,000 dogs a week go to Aussie Vet clinics - from owners forgetting their dog's parasite prevention. That's why Dr Tegan helped start Easy Protect, and her team love writing helpful articles for Aussie dog owners.

About the Author, Dr. Tegan and our petcare team.

Over 1,000 dogs a week go to Aussie Vet clinics - from owners forgetting their dog's parasite prevention. That's why Dr Tegan helped start Easy Protect, and her team love writing helpful articles for Aussie dog owners.