NexGard

Selamectin for Dogs & Cats: Stop Fleas, Ticks & Heartworms

Search Petco for information on selamectin for pets of all kinds. We have all the details on how to prevent heartworms & parasites to keep your pet healthy.

Updated on October 23rd, 2025

Nitenpyram: End Fleas Fast for Dogs & Cats – Your Essential Guide

Nitenpyram is an oral treatment that kills fleas quickly in both dogs and cats. Find effective nitenpyram tablets at Petco.

Updated on October 23rd, 2025

Your Cat's Best Life: Feeding, Health, Behavior & Home Guide

Learn how to care for your cat, recommended diet and grooming care. Find the right food, supplies and equipment at your neighborhood Petco.

Updated on October 23rd, 2025

Stop Fleas, Ticks & Mosquitoes: Pet Pest Prevention for a Healthy Pet

You may have heard that flea and tick prevention are crucial for dogs and cats, but do you know why? Petco is sharing why and how to prioritize pest prevention for your pet.

Updated on October 23rd, 2025

Flea-Free Cats: Injectable Prevention for Lasting Protection

Because fleas are so problematic, flea prevention is essential! Commonly prescribed preventives include oral and topical medications—although injectable flea prevention is available, as well.

Updated on October 23rd, 2025

What's the best flea, deer tick, heartworm for dogs, cats, and kids?

Great question! Nexgard kills the deer tick as well as fleas and American dog tick/rocky mountain tick, and lone star tick. It is an oral pill as well, so I would us that for your dogs. Because Nexgard doesn't protect again heartworms, you will have to give your dogs Heartgard as well, which is available by prescription only from the vet. Advantix is a spot on treatment that treats the same things as Nexgard, but you would also have to use Heartgard as well for the heartworms. These two medications (Nexgard and Advantix) are for dogs only. As for the cats, Simparica prevents five types of ticks, so this may work for your cats :-)

Where can I get affordable Nexgard for my dog's prescription?

You can find this product at any of the online veterinary pharmacies. In order to find the best value I would recommend going on goodrx.com. On this website you will be able to type in the medication and dose and it will provide you with coupon codes and the location of where you need to obtain the product. Regardless of what site you use you will still need to obtain a prescription from your veterinarian. I always caution my clients when they are planning to purchase these types of products from pharmacies of unknown origin as we cannot be certain how the drugs are being stored and what source they are obtaining the drugs from. Do your due diligence before deciding on which place to use. I have had relatively good experiences with Valley Vet Supply.

My puppy is growing. What Nexgard dose should I buy for his weight?

Since he is still growing, I recommend starting with 3 doses, or even single doses until he is either done growing or over 10 pounds. Check his weight prior to each dose to assure that he is still in the appropriate dose range.

Is it safe to give my dog Nexgard if Hartz flea treatment didn't work?

You can give him the Nexgard now. There is more you can do: fleas only hop on the body of your pet when they want to feed, then they hop off again and stay in your pet's environment. So you need to treat all pets in the household as well as the environment (which contains the fleas, their eggs and larvae). Flea treatment:  1) Get some flea medication such as a Flea spray or a spot on from a pet shop or your veterinarian and apply monthly (Nexguard is great) 2) get flea powder, put some in your vacuum cleaner bag and vacuum your house and furniture and also non-carpeted areas frequently to remove flea larvae and eggs which live off house dust., Dispose of the bag in the trash outside. Hot-wash all the pet's bedding, If you do this diligently for a few months you will get rid of the fleas.

Best flea prevention for dogs: collar or pill, safe around cats?

Since you have cats it’s best to get Sunny on an oral flea preventative, such as Bravecto, Nexgard, Simparica, Comfortis or Trifexis (flea and heartworm preventative. Best wishes keeping those fleas at bay with Sunny. Take care.