Senergy Topical Solution for Cats, 5.1-15 lbs, (Blue Box), 3 Doses (3-mos. supply)

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About This Item

Details

  • Helps prevent heartworm disease
  • Kills adult fleas and treats flea infestations
  • Treats and controls ear mites and intestinal parasites including roundworms and hookworms
  • Contains selamectin
  • Monthly topical parasite protection

Ingredients

Instructions

FAQ

Learn More About Senergy From Our Team of Experts
4.6
Rated 4.6 out of 5 stars
296 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

88% Positive

Effectiveness

86% Positive

Ingredients

85% Positive

Long-Term Benefits

85% Positive

117 Customer Reviews



Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 5 out of 5 stars
Verified Purchase
By Kori on Feb 23, 2022

Best topical for a cat I have ever seen in my life.

My mother worked for a vet when I was younger and we used to use Frontline on our animals a few years ago my 13-year-old dog all the sudden I started having skin

My mother worked for a vet when I was younger and we used to use Frontline on our animals a few years ago my 13-year-old dog all the sudden I started having skin problems at the application site. needless to say we had to discontinue the use of Frontline to protect him from fleas. The cats however just had to be put on a flea collar which doesn't really do much if you've ever used one I took my children's new cat Abby to the humane society as her primary veterinarian she loves it they're good with her this was what they recommended as a matter of fact they were kind enough to give us a box for free after that ran out I decided to purchase more through chewy because as I said not only does it control the fleas but it controls the yucky smell coming out of her ears and it prevents worms doesn't bother her skin does not smell bad or stain her fur and she's white best hands down topical product I have ever seen for a cat.


Rated 5 out of 5 stars
Verified Purchase
By Amanda on Feb 12, 2025

Effective

I love Synergy topical solution for my cat because it gives Isaac the protection from fleas and ticks that he needs. Also it's very affordable and I get a discount

I love Synergy topical solution for my cat because it gives Isaac the protection from fleas and ticks that he needs. Also it's very affordable and I get a discount with consistent purchases. I never have to wait too long for my package to arrive. I highly recommend this product.


Rated 5 out of 5 stars
By Victoria on Aug 21, 2024

Sure helped!!

My house was under a flea infestation. Having a cat suffering from flea anemia, we rushed her to ER vet and one thing they did was use this product on her. We are

My house was under a flea infestation. Having a cat suffering from flea anemia, we rushed her to ER vet and one thing they did was use this product on her. We are continuing to use it (and had the house professionally sprayed), and she has pulled through very well! P.S. You need a prescription to get this.


Rated 1 out of 5 stars
Verified Purchase
By Susan on Aug 7, 2025

I think fleas are laughing at this stuff as they do cartwheels across my floor!

I was using Revolution Plus and my cat had zero fleas. I decided to try and save some money and try Senergy. I purchased the 3 pack. HUGE mistake! My cat is covered

I was using Revolution Plus and my cat had zero fleas. I decided to try and save some money and try Senergy. I purchased the 3 pack. HUGE mistake! My cat is covered in fleas and my ankles are bit up. I'm flea combing her 2x/day. Each time, I get anywhere from 1 flea to as much as 14. One day, between the 2 combings, I found 22 fleas on her in 1 day. I am vacuuming the whole house every day, which is very tiring. I can't use any chemicals in my home, so I'm trying natural flea sprays that are not working. I have to wait until the 30 days are up to switch her back to Revolution Plus. My poor cat is having allergic reactions to the fleas and scratching. My ankles are itching, too. We are suffering and miserable. Spend the extra money and get something that works. I do not recommend this product and I will NEVER buy it again.


Rated 5 out of 5 stars
By Cheryl on Aug 16, 2023

Favorite for heartworm prevention

Originally my cats had all been on Revolution. A couple of them had issues with the Revolution application site and all their hair falling out and my cats hated

Originally my cats had all been on Revolution. A couple of them had issues with the Revolution application site and all their hair falling out and my cats hated the smell of Revolution and would flee when they saw me getting ready to put it on them. I had none of these problems with Senergy. Less chemical smell, less cat freak outs, happy all around. My vet switched to Nexgard and first application major problems. It has way more liquid, did not stay on the application site & one cat was able to lick it and then drooling everywhere. I am going back to using Senergy. I’m going to order it from here rather than get Nexgard from my vet. I just want to keep my cats from getting heartworms and not make them miserable doing it.


Rated 5 out of 5 stars
By Ajani on Apr 10, 2022

MY VET RECOMMENDED THIS, THIS IS AMAZING

This is amazing, it treats so many things at once. Not sure what the one person was talking about. Maybe he should of waited until the next day to comment? If your

This is amazing, it treats so many things at once. Not sure what the one person was talking about. Maybe he should of waited until the next day to comment? If your pet had A LOT of fleas they would of taken time to all die off. If anything, if your pet has A LOT of fleas it may need until next month's dose to really see the effects. I personally never had ANY issues with senergy though, other than holding my cat still sometimes while I apply the senergy.


Rated 5 out of 5 stars
Verified Purchase
By Heather on Jul 14, 2023

It works!

I have 5 cats and have struggled with fleas for years (because of my area). The last year has been the worst and Advantage 2 completely stopped working. I'm 6 weeks

I have 5 cats and have struggled with fleas for years (because of my area). The last year has been the worst and Advantage 2 completely stopped working. I'm 6 weeks into using this product (2 doses) and about 80% of fleas I've brushed off my cats were already dead. It's pricier than the OTC stuff, but it works way better. I used to brush a cat and get 10-20 fleas off. Now (6 weeks after I started), maybe 1 and it's already dead. I can't believe how effective it is compared to what I was using. My cats had no bad side effects at all and it's easy to apply (to all but my semi feral cat).


Rated 5 out of 5 stars
Verified Purchase
By Ivory on Aug 1, 2023

works just fine for little ivory

My cat is typically an indoor cat, I will occasionally bring her out on a leash and let her roam around so I started giving her the flea medication with heartworm

My cat is typically an indoor cat, I will occasionally bring her out on a leash and let her roam around so I started giving her the flea medication with heartworm prevention and this is the first one we’ve tried and it’s worked fine, my older brother who is a vet actually recommended it to me so it’s accurate. No hair loss, no infection, no sicknesses, I mean it does depend on the cat but overall I’d say this is one of the safer options that do it all if you’re trying to go on the cheaper route!


Rated 5 out of 5 stars
Verified Purchase
By Juanita on Jun 3, 2022

No negative reaction

Off brand topicals make me nervous because some have caused my cats fur to fall out. This was fine.I used it for 2 months on 3 different cats and nobody had a negative

Off brand topicals make me nervous because some have caused my cats fur to fall out. This was fine.I used it for 2 months on 3 different cats and nobody had a negative reaction. I like that it's less liquid and dries faster than Advantage. My cats didn't have fleas when I applied it. They didn't get fleas while on it. I don't know how well it works on active flea problems.


Rated 2 out of 5 stars
Verified Purchase
By Donna on Mar 1, 2024

Unreasonably Priced Dry Catfood

This is a very good product as far as effectiveness and nutrition for cats with digestive issues. I've given this to my cats when they have problems with diarrhea

This is a very good product as far as effectiveness and nutrition for cats with digestive issues. I've given this to my cats when they have problems with diarrhea and it helps to clear it up. Since it is effective, I began to feed this regularly for a preventive source of nutrition. That said, unless one has unlimited funds to spend on pet food, the price is outrageous, as are many of the pet food prices these days, since the severe inflation became part of daily life last year. It was costly before, but now it's beyond my ability to pay. And I formly believe this is due to greed on the part of the manufacturers. I'm pretty sure the cost of the ingredients are a fraction of what the company is charging for this product, and most likely most cat and dog food products. Read the labels. I cancelled my autoship. I don't know why I ever set it up in the first place other than one of my cats seemed to benefit from this Blissful Belly dry cat food. Im going to try making home made food to supplement some of their processed food. They probably will get a better quality of food that way. There are numerous resources provided by veterinarians with recipes that are complete in nutritional needs