Nexgard Spectra: A Review

There are many tick and flea control products readily available on the market. Due to a favourable shift in the temperature, there are lot more fleas out and about, making your dog look like a 3 course meal with a complimentary after dinner cheese platter. The well known and internationally acclaimed flea protection product, Nexgard Spectra is usually thought of when mentioning flea and critter control. You can find it in Coles and Woolies and just about everywhere. It is highly advertised and even recommended by professionals - but does it live up to its reputation? We’ve taken to the net and found that Nexgard may not be the next best thing. 





Nexgard vs Nexgard Spectra

When comparing the two, Nexgard Spectra claims to be a more effective flea and tick remover. I have put together a table down below. 



Nexgard Spectra


Nexgard is the best oral treatment that kills fleas and ticks. It comes in a beef-flavoured chewable that eliminates fleas and ticks.

Nexgard is the multispectrum treatment that works to kill fleas & ticks and also effective in eradicating intestinal worms. Moreover, Nexgard Spectra is also an amazing Heartworm preventive.

Active Ingredients


Afoxolaner, Milbemycin Oxime

How Does It Work 

Nexgard contains a powerful called Afoxolaner which is an insecticide and acaricide used for the treatment and prevention of flea infestation as well as treat and controls ticks. Afoxolaner attacks the central nervous system of the flea and ticks by sending them to hyperexcitation which results in uncontrolled activity and death.

Nexgard is the oral product that contains compounds called:

  • Afoxolaner: insecticide and acaricide to kill fleas & ticks
  • Milbemycin Oxime: antiparasitic endectocide to eliminate internal parasites


Nexgard comes in a beef-flavoured chewable that eliminates adult fleas even before they can lay eggs.

It kills fleas before they lay eggs and helps to reduce contamination of the dog’s environment.


The chewable treats and controls ticks including paralysis ticks.

The oral chew destroys and prevents ticks including paralysis ticks.

Intestinal Worms

Nexgard Spectra eliminates whipworms, roundworms, and hookworms. It also controls flea tapeworms in dogs.


The monthly treatment prevents heartworm disease in dogs.

Other Parasites

It also prevents ear mites, demodectic, sarcoptic, and otodectic manage infestation in dogs.


It is a monthly treatment that killing fleas faster and eliminates 99% fleas within 8 hours of administration.

Nexgard Spectra acts as a single treatment to control external and internal parasites in dogs. It is Once in a month dosage, which is very convenient.


Nexgard Spectra has been rated a 2.4 stars out of 5 on popular product review website, Out of 59 people, 34 gave it a 1 star rating with only 17 giving it 5 out of 5 stars. As per the website, the most popular side effect was short term illness with several commenting that the product gave their dog bloody diarrhea and even resulting in hospitalisation. Long term illnesses included neurological problems such as paralyzation and seizures.  Five people out of the 59 commented have claimed Nexgard Spectra even killed their dog. 

Nexgard has faced similar backlash being rated a 1.6 stars on Approximately 75% of the people who reviewed this product (624), gave  it a 1 star rating. Like its apparent more modern and healthier counterpart, Nexgard has also faced complaints that it has killed their dog and or impaired them for life. Symptoms like diarrhea, seizures and paralysis can be seen throughout these reviews also. One reviewer by the name of Vicky stated

 “My dog was fine this morning, until after he ate his food... which contained the Nexguard chewable. A few hours later, he wouldn't come down the steps to go outside. I went up to check on him and he was shaking and his nose was dripping. He could barely walk!” 

Another reviewer by the name of Lou mentioned the side effects of this product

“Gave Nexguard to my pup with dinner, next morning she couldn’t move and spent a week at the vet- vomiting, bloody runny stools, lethargy, foaming, temperature, not eating, panting...still has relapses. It’s POISON!” 

Facebook Group

There is a facebook group by the name of ‘Does Nexgard Kill Dogs?’. This facebook group has amassed over twelve thousand members. There is a link within this facebook group to another group that is taking legal action against Nexgard in Canada. This group has over 140 members. Under this shared link people have posted comments such as My poor old German Shepherd had a stroke and lost most of his sight after his first (and last) Nexgard dose” and “Long overdue. Hopefully this(/these) poison(s) will be removed from the market.” 

A woman by the name of Kristin Noneman posted a montage of her dog Rowan with the hashtag #RowansNexgardStory. 

Nexgard Spectra’s Response 

Nexgard has responded to these accusations saying that the negative side effects listed above and more were “uncommonly observed” and that less than 1 out of 10,000 dogs experienced these negative side effects 


There is enough stir about this online for those who work at Nexgard to notice. We want an honest answer. Why are our dogs dying? Why haven't you aimed to change anything? What I’ve also noticed (this is not an accusation but simply an observation), all the companies that sell Nexgard and Nexgard Spectra only include its 5 star reviews on their website. There are literally thousands of people online that have had issues with this product and you’re telling me that companies like PetStock only have 5 star reviews? 

I speak on behalf of all the people who have lost their dog to Nexgard and their toxic products - give us answers now! 

Read also : Nexgard Spectra Purple: The Complete Parasite Protection