NexGard Spectra for Dogs
No Prescription Required

NexGard Spectra is a monthly oral chew containing afoxolaner and milbemycin oxime, indicated for the prevention and treatment of fleas, ticks, mites, heartworm, and intestinal worms in dogs from 8 weeks of age and 2 kg body weight. The collection available through Anipetshop covers five weight-based strengths, from 2 kg to 60 kg, with each variant delivering afoxolaner at a minimum of 2.5 mg/kg and milbemycin oxime at a minimum of 0.5 mg/kg per dose.

Anipetshop operates as a licensed pharmacy under Australian APVMA regulations, which classify NexGard Spectra as an over-the-counter product, and the active ingredients and labeled dosages are identical to prescription versions dispensed in the European.

Can You Buy NexGard Spectra for Dogs Without a Vet Prescription?

Yes. Anipetshop is a licensed online pharmacy operating under Australian APVMA regulations, where NexGard Spectra is classified as a non-prescription parasiticide and can be supplied without veterinary authorization.

Prescription requirements are determined by the regulatory framework of the dispensing country rather than the purchaser’s location. In the European Union, it holds a centralized marketing authorization and is classified as a non-prescription veterinary medicinal product under Regulation (EU) 2019/6 in multiple member states. The APVMA classifies NexGard Spectra as an over-the-counter product, permitting licensed Australian pharmacies to dispense it without a prescription.

Hence, NexGard Spectra is available over the counter, allowing licensed pharmacies such as Anipetshop, based in Noosaville, to legally supply the product to international customers, including those in the U.S., Canada, and the UK. The formulation contains afoxolaner and milbemycin oxime at identical concentrations and labeled dosages to the prescription equivalent marketed in the United States, ensuring consistent pharmacological efficacy and safety.

Explore the Chewable Tablet Formulation

NexGard Spectra is a monthly soft chew containing two active ingredients: afoxolaner and milbemycin oxime. Afoxolaner targets fleas, ticks, and mites by blocking GABA-gated chloride channels in the parasite’s nervous system. Milbemycin oxime prevents heartworm and eliminates intestinal worms by disrupting glutamate-gated chloride channels. Together, they deliver systemic protection for 30 days per dose.

The chew is formulated with soy protein to produce a braised beef flavor and contains no actual beef. In clinical assessments, voluntary consumption was demonstrated in over 90% of dogs, and the chew can be administered with or without food. The following formulation details apply across all weight variants:

• Flavoring: Braised beef flavor derived from soy protein, with no animal-sourced beef content. Dogs with confirmed soy allergies should be assessed by a veterinarian before use.
• Excipients: Corn starch, soy protein, povidone, and potassium sorbate, in addition to the active ingredients.
• Physical form: Reddish-brown soft chewable with a semi-moist texture. Shape varies by strength: smaller variants are circular, larger variants are rectangular.
• Storage: Store at or below 86°F (30°C) in the original foil blister to protect from light and moisture.

NexGard Spectra is available in five weight-based strengths. The table below lists pack options and pricing currently available through Anipetshop:

Take the Correct Dosage

NexGard Spectra dosing is determined by body weight, with a minimum delivery of 2.5 mg afoxolaner and 0.5 mg milbemycin oxime per kg, administered once every 30 days. Body weight, not age or breed, determines which chew strength to select. Weigh your dog before starting treatment and recheck weight periodically, as dogs that gain weight may require a higher-strength chew to maintain adequate dosing.

The table below shows the active ingredient content per chew across all five weight-based variants:

If your dog is approaching the upper limit of a weight range, use their current weight to confirm the correct pack before dosing. For example, a dog currently weighing 29 kg falls within the Purple (15.1 to 30 kg) range, but if that dog reaches 31 kg at the next dose, the Red (30.1 to 60 kg) chew should be used. Administering a lower-strength chew to a dog that has moved into the next weight category results in underdosing, which reduces efficacy against heartworm and intestinal parasites.

For dogs over 60 kg (132 lbs), no single chew covers the full weight range. Combine chew strengths to meet the minimum labeled dose of 2.5 mg afoxolaner per kg. Consult a veterinarian to confirm the correct combination for your dog’s specific weight.

Why Should Dog Owners Choose NexGard Spectra?

Dog owners select NexGard Spectra primarily because it combines heartworm prevention with flea, tick, mite, and intestinal worm control in a single monthly chew, eliminating the need to administer separate products on different schedules. Both active ingredients, afoxolaner and milbemycin oxime, work systemically after ingestion, which means the product remains effective regardless of bathing or swimming. The following points outline the clinical basis for each benefit:

• Heartworm and intestinal worm prevention. Milbemycin oxime eliminates Dirofilaria immitis larvae before they mature, and clears roundworms, hookworms, and whipworms through disruption of glutamate-gated chloride channels. A single monthly dose maintains continuous preventive coverage.
• Flea and tick elimination. Afoxolaner begins killing fleas within 6 to 8 hours and controls ticks within 24 hours by blocking GABA-gated chloride channels, causing paralysis and death in the parasite. Coverage includes paralysis ticks, brown dog ticks, and bush ticks.
• Mite treatment. Afoxolaner is also active against demodectic mange, sarcoptic mange, and ear mites through the same mechanism as its flea and tick action.
• Waterproof coverage. Because both active ingredients are absorbed into the bloodstream after ingestion, efficacy is not reduced by bathing, swimming, or grooming at any point during the 30-day dosing interval.
• Established safety range. NexGard Spectra is labeled for use in puppies from 8 weeks of age and 2 kg body weight. Clinical data supports use in dogs carrying the ABCB1 (MDR1) gene mutation and in breeding, pregnant, and lactating dogs. Dogs with a history of neurological conditions should be assessed by a veterinarian before use.

How Do Pet Owners Review Non-Prescription NexGard Spectra Online?

Pet owners purchasing NexGard Spectra through Anipetshop report consistent flea, tick, and worm control across the 30-day dosing interval. Voluntary acceptance is a recurring observation, with owners noting dogs consumed the chew without requiring it to be concealed in food.

One Facebook reviewer reported their dog accepted the beef-flavored chew immediately and remained free from fleas, ticks, and intestinal worms for the full month following administration.

Order NexGard Spectra for Dogs Without a Vet Prescription at AnipetShop

NexGard Spectra purchased through Anipetshop contains the same active ingredients, afoxolaner and milbemycin oxime, at the same labeled dosages as products dispensed in the European market. Anipetshop sources directly from original manufacturers and does not carry generic or substitute formulations. The following points describe the sourcing and supply conditions that apply to all orders:

• Product authenticity. All products are original manufacturer stock, not generics or reformulations. English labeling is included on all packs.
• Supply chain. Products are sourced from licensed manufacturing facilities across Australia and Europe.
• Shelf life. All products dispatched carry sufficient remaining shelf life to complete the intended course of treatment at the time of delivery.
• Prescription status. No veterinary prescription is required to place an order. Anipetshop operates under APVMA regulations, which classify NexGard Spectra as an over-the-counter product.

How NexGard Spectra Works on Dogs

NexGard Spectra contains two active ingredients, afoxolaner and milbemycin oxime, both absorbed into the bloodstream after ingestion. Parasites are exposed to these compounds when they feed on the treated dog, not through contact with the coat or skin surface.

Afoxolaner is an isoxazoline compound that blocks GABA-gated chloride channels in insects and arachnids, causing uncontrolled nerve activity, paralysis, and death. Fleas begin dying within 6 to 8 hours of administration; tick control is established within 24 hours.

Milbemycin oxime targets glutamate-gated chloride channels in nematodes and heartworm larvae, causing paralysis and expulsion. It eliminates Dirofilaria immitis larvae before maturation and clears roundworms, hookworms, and whipworms from the gastrointestinal tract.

As both compounds act systemically through the bloodstream, efficacy is not reduced by bathing, swimming, or grooming at any point during the 30-day dosing interval.

How Should You Administer NexGard Spectra?

NexGard Spectra is administered as a single oral chew once every 30 days. The steps below cover the checks and actions required before and during each dose to ensure the full amount is absorbed and the correct strength is used:

Step 1: Pre-treatment safety check. Dogs over 6 months of age should be tested for existing heartworm infection before starting NexGard Spectra. Administering a preventive to a heartworm-positive dog does not treat the existing infection and may mask the condition. Do not use in dogs under 8 weeks of age or under 2 kg. Dogs with a history of neurological conditions should be assessed by a veterinarian before use.

Step 2: Confirm body weight. Select the chew that corresponds to your dog’s current weight using the labeled weight ranges. For example, a dog weighing 22 lbs will require a different dosage strength than a dog weighing 55 lbs.

Step 3: Administer the full chew. Give one chew orally, with or without food. The entire chew must be consumed for the dose to be complete. If the dog vomits within 2 hours of administration, give a full replacement dose, as the active ingredients may not have been fully absorbed.

Step 4: Handle refusal. If the dog does not accept the chew whole, break it into smaller pieces and mix with food. Confirm the entire dose has been consumed before considering the administration complete.

Step 5: Maintain the 30-day interval. Administer once every 30 days without interruption. Gaps in dosing create windows during which heartworm larvae can mature past the preventable stage.

No post-dose waiting period is required. Bathing or swimming immediately after administration does not affect efficacy because the active ingredients are absorbed systemically, not topically.

Are There Any Side Effects of NexGard Spectra to Consider?

NexGard Spectra can cause side effects in some dogs, most commonly gastrointestinal reactions. The related document has also issued a class-level alert for isoxazoline compounds, including afoxolaner, noting an association with neurological adverse events. The following reactions have been reported following administration:

• The most frequently reported adverse effect. If vomiting occurs within 2 hours of administration, the dose may not have been fully absorbed and a complete replacement dose should be given.
• Loose stools or mild gastrointestinal upset may occur and typically resolve without intervention.
• Reduced activity has been reported in the short period following dosing.
• Reduced appetite. A transient decrease in food intake may occur within the first 24 hours.
• Skin irritation has been reported in some dogs following administration.
• Neurological reactions. Tremors, ataxia, and seizures have been reported in dogs receiving isoxazoline-class medications. These events are uncommon but are not restricted to dogs with pre-existing neurological conditions. Dogs with a history of seizures or neurological disorders should not receive NexGard Spectra without prior veterinary clearance.

Are There NexGard Spectra Alternatives That Don’t Require a Vet’s Prescription?

Yes. Simparica Trio, Credelio Plus, Advocate, and Milbemax are available through Anipetshop without a veterinary prescription under APVMA regulations. Each differs from NexGard Spectra in active ingredients, delivery format, or parasite coverage. The bullets below outline the clinical distinctions relevant to product selection:

• Simparica Trio (sarolaner + moxidectin + pyrantel). Monthly oral chew covering fleas, ticks, heartworm prevention, roundworms, and hookworms. Coverage profile is closely comparable to NexGard Spectra; sarolaner is an isoxazoline compound and carries the same FDA class-level neurological risk alert as afoxolaner.
• Credelio Plus (lotilaner + milbemycin oxime). Monthly oral chew covering fleas, ticks, heartworm prevention, and intestinal worms including roundworms, hookworms, and whipworms. Lotilaner is an isoxazoline compound; the same neurological risk considerations apply as with other isoxazoline-class products.
• Advocate (imidacloprid + moxidectin). Monthly topical spot-on applied to the skin at the back of the neck. Covers fleas, heartworm prevention, roundworms, hookworms, and whipworms. Does not cover ticks. Dogs in tick-endemic regions require a separate tick-control product if Advocate is used.
• Milbemax (milbemycin oxime + praziquantel). Monthly oral tablet covering heartworm prevention and intestinal worms including roundworms, hookworms, whipworms, and tapeworms. Does not cover fleas or ticks. Used when flea and tick control is managed separately or is not required.

If product selection depends on your dog’s individual health history, existing parasite burden, or region-specific tick risk, consult a veterinarian before switching.

What Is the Difference Between NexGard Spectra and NexGard?

NexGard Spectra contains afoxolaner and milbemycin oxime; NexGard contains afoxolaner only. The addition of milbemycin oxime in NexGard Spectra extends coverage to heartworm larvae and intestinal worms, which afoxolaner alone does not address.

The table below compares parasite coverage between the two products:

Note: Off-label use indicates veterinary prescription outside manufacturer-labeled indications. Consult a veterinarian before use for these conditions.

Dogs in heartworm-endemic regions or with confirmed intestinal worm exposure require a product that includes milbemycin oxime or an equivalent anthelmintic. NexGard alone is not sufficient for those cases.

FAQs

How long does NexGard Spectra take to start working?

Afoxolaner begins killing fleas within 6 to 8 hours of administration. Tick control is established within 24 hours. Milbemycin oxime acts against heartworm larvae and intestinal worms through the same dosing cycle, with prevention maintained continuously when the 30-day interval is kept.

What if my dog vomits after taking NexGard Spectra?

If vomiting occurs within 2 hours of administration, give a full replacement dose, as the active ingredients may not have been fully absorbed. Vomiting after the 2-hour window does not require a replacement dose.

Can I split a large chew for two smaller dogs?

No. Afoxolaner and milbemycin oxime may not be evenly distributed throughout the chew matrix, so splitting produces unpredictable dose delivery. Each dog should receive the chew strength corresponding to their individual body weight.

Can my dog go swimming or be bathed after treatment?

Yes. Both afoxolaner and milbemycin oxime are absorbed systemically into the bloodstream after ingestion. Bathing or swimming at any point during the 30-day dosing interval does not reduce efficacy.

Is a heartworm test necessary before starting?

Yes, dogs over 6 months of age should be tested for existing heartworm infection before starting NexGard Spectra. Milbemycin oxime prevents larval development but does not treat an established adult heartworm infection. Administering a preventive to a heartworm-positive dog without treatment for the existing infection can result in adverse reactions.

Is NexGard Spectra safe for all breeds?

NexGard Spectra is labeled for use across all breeds, including dogs carrying the ABCB1 (MDR1) gene mutation, such as Collies and related herding breeds. Dogs with a history of seizures or neurological conditions should be assessed by a veterinarian before use, as afoxolaner belongs to the isoxazoline class, which carries an FDA class-level neurological risk alert.

Can NexGard Spectra be used on pregnant or lactating dogs?

NexGard Spectra is approved for use in pregnant and lactating dogs. For breeding animals, veterinary assessment before starting or continuing treatment is recommended.

What should I do if I miss a dose of NexGard Spectra?

Administer the missed dose as soon as it is identified, then resume the monthly schedule from that new date. Do not double the dose to compensate. A gap in dosing creates a window during which heartworm larvae can mature past the stage at which milbemycin oxime is effective.

How does NexGard Spectra compare to Simparica Trio, Credelio Plus, Advocate, and Milbemax?

NexGard Spectra, Simparica Trio, and Credelio Plus offer comparable broad-spectrum coverage in a monthly oral chew; Advocate provides similar internal parasite coverage as a topical spot-on but does not cover ticks; and Milbemax addresses heartworm and intestinal worms only, without flea or tick control.