The parasites don’t let go even a chance to stay away from your pet. Not only fleas and ticks but the intestinal parasites also haunt your pup. Therefore, Merial/Boehringer Ingelheim has introduced two best products in the market to combat internal and external parasites. Both these products possess their own characteristics. The only task all the pet parents need to tackle is to choose the right flea and tick treatment for your Fido. So, here’s a comparison chart to clear out the confusion so that pet parents can choose the best suitable product for their pup.


Subject Nexgard Nexgard Spectra
Introduction 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 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


Fleas 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.
Ticks 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.
Heartworms Nexgard can be used along with a heartworm preventive.

The monthly treatment prevents heartworm disease in dogs.
Other Parasites It also prevents ear mites, demodectic, sarcoptic, and otodectic manage infestation in dogs.
Efficacy 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.


Safe To Use Safe for dogs and puppies 8 weeks and older. Your dog can swim or bath right after administering the chews as it cannot wash off and remains effective. The monthly treatment can be used in puppies from 8 weeks of age. Safe for all breeds of dogs and it is not affected by bathing or swimming your dog.


Nexgard has proven to potentially powerful flea and tick treatment and prevention for dogs. The studies and clinical experience also show that it is very effective in preventing Lyme, Anaplasmosis, Ehrlichiosis and Rocky Mountain spotted fever. While other fleas and tick treatments can be messy and not so preferred by your dog, Nexgard is loved by dogs due to its palatable flavour and it is vet recommended flea and tick treatment for dogs. And Nexgard Spectra is a monthly treatment that ensures effective prevention and treatment against heartworms, fleas, ticks, and intestinal worms. It covers both, internal and external parasites which is one of the major advantages for dogs.

Therefore, pet parents can use Nexgard for their pup if their pet is suffering from fleas and ticks. However, if your Fido is infected by internal as well as external parasites the Nexgard Spectra will be the right pick.