NexGard Spectra
161 reviews
I brought Nexgard l thought my cat was going to die. He was lathrgic not eating and could hardly walk for 24 hours. However my other cat had no side effects. I never used it again. Show details
Reviews with attachments
I'm Convinced Nexgard Spectra Killed My Whippet Puppy – A week ago we gave our 6 month old Whippet Puppy a single monthly dose of Nexgard Spectra. Within 24 hours she was "ticking" and having tremors which progressed over the next few days into uncontrollable tremors /ataxia. We have been to the vet numerous times and have been treating her symptomatically with multiple medications. As of yesterday we… Read more
thought we might have been through the worst of it as she wasn't getting any worse. This morning she went into a massive rolling seizure and we rushed her to after hours emergency. The seizure lasted way too long. The Vets couldn't control it and after a day of fighting we made the decision to put her to sleep after she started displaying signs of organ damage.
We are distraught.
Prior to the Nexgard treatment she was a 100% healthy, genetically sound, vibrant puppy. We eliminated all environmental and parasitic factors as being the cause. Her blood tests in the early stages were perfect. I have spoken to Nexgard, they basically refuse to entertain the idea that it could have been the cause, but then also wont dismiss it entirely. My vet spoke to them and regurgitated the same DATED side effect statistics they told him and then said it is very hard to prove.
All said and done. One day my puppy was perfect and a week later DEAD after a Nexgard treatment. Never again.
*In the pursuit of fairness, I will add that our other puppy, a 7 month old Australian Shepherd was treated at the same time and is 100% fine with no side effects. However he will never be receiving Nexgard again. Many of the negative reviews online (How I wish I did my due diligence before using this product) suggest that severe reactions may occur after multiple doses. The chances of acute side effects are most likely incredibly rare, but to me now, not worth the risk.
lol I can’t believe the bad reviews, I use this for my 9 month kitten and it is great. I have read reviews on all the different flea and worm treatments and it seems every brand has bad reviews also, I think some people just need something to complain about. I have added a pic of my beautiful Salem, shiny coat and very healthy. No fleas , no worms of any type. Couldn’t be happier with this product. Show details
Product malfunctioned on first use – I purchased this because the syringe applicator looked really easy to use and my cat is very difficult with anything that sniffs even remotely of "medical treatment". However when I depressed the plunger it offered no resistance resulting in the application being squirted all over my cat's head and ears causing her to freak out. The instructions… Read more
tell you to withdraw the applicator slightly before use but not why you have to do this or how. I wish they'd put these vital steps in BIG, BOLD type and explain WHY you need to do this. As it is I've got one very stressed cat, flea prevention liquid all over my hands and $15 down the drain. There's always some little surprise or trick to be wary of with these flea treatment applicators and frankly it's not good enough. You need to inform your customers clearly in the instructions what they're doing & why so that these kinds of "accidents" don't happen. Cats are not dogs. Most of them are instinctually wary of any kind of medical treatment and they are super-intelligent as well. It'll be impossible to use this on my cat again. Very disappointed.
Nexgard – I bought the nextgard spectra before reading review and thought oh no, I can't use this on my cat! But it has worked amazingly on her! I put it a little higher on her neck to insure she would not ge able to lick it & get sick and she is now a very happy girl without any irritation. Show details
DO NOT BUY! TOOK VARNISH OFF COFFEE TABLE – I bought the 2.5-7.5kg for use on my cats, not dogs but everyone should be aware. A few drops got spilt on the coffee table and a nintendo switch controller and it took off some of the varnish and melted the plastic from just a few drops! I cannot believe I just put this on my cats! Show details
Positive reviews
Easy use of their website. I liked the confirmation of the delivery address after the order was placed to prevent incorrect delivery. I've never struck that before. Show details
Can't believe the level of some butt hurt review because they couldn't use a syringe applicator. Yeah, press down all at once and guess what... It all squirts out. Doesn't need to be written in big bold letters for people. The product applies easily. Have three cats and none had any negative reaction to it. Recommend. Show details
My dog is very elderly. Up until this year, we used the basic NexGard, wormed him and took him to the vet for his yearly injections. This year we have been using NexGard Spectra and it has been very successful. Our dog is happy to eat the chews.
Negative reviews
Please avoid this product. It is a real poison for dogs and I don't understand the Australian government allowing this poison for sale. My dog Googie bulldog almost died from this poison. He was in emergency animal hospital for one day, and 2 days in animal hospital. It cost me a fortune , but I have to save my fur baby. This product is a… Read more
very expensive product and also poison. Help another, this product should be banned from the sale all around the world !!!
Been giving this product to my 10 month old Iggy since she was old enough to take it. She recently had to go to the vet as she had explosive bloody diahrroea. They took a stool sample about found antigens for hookworm, tapeworm, roundworm, and giadia. Useless. Show details
Our cat had a bad reaction after using NexGard and was vomiting for days. It also did nothing to get rid of her worms, so it was a big disappointment all round. Show details
Find out how NexGard Spectra compares to other Heart & Intestinal Wormers
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Recent reviews
I have only just bought Nexgard for my Border Collie. I should have read the reviews before paying $47.00 all up including a very costly delivery. Now I’m too frightened to give it to him. There are some good reviews but it seems the more I read, the more negative they are. I might just give him half and wait a couple of days to see how he goes.
Nexgard spectra is a good product. We used to have our dogs on simparica trio which was making them sick every month. But nexgard spectra is great with no issues for our dogs. We recommend nexgard spectra. Show details
I can't tell the effectiveness of the chew. I give it a ONE since it was formulated 'NOT DOG friendly' in my words My puppy didn't like it since day one which surprised me!!!! He spit it out even though the chew was broken to smaller pieces. It took some effort to ensure he ate every bit of the chew by mixing with milk bone etc I read other… Read more
reviews which other dog owners had thesame challenge. To Nexguard, my suggestion is to test it on different breed of dogs and improve the product. Think about it, a dog chew which dogs dislike. Absolutely it is a failure, isn't it?
I used this product to protect my pet against all the nasty bugs worms ticks etc,as I thought this was the best in the market. But unfortunately failed to do so and my little dog became very ill for weeks, after many visits to the veterinary clinic, tests came back as positive for round worms. I was so disappointed with nexguard as it didn’t deliver as promised on the packaging. Show details
Great protection for 30 days against flea, ticks and worms, I’ve been using Nexgard for ten years now and it’s been great and Iv never used any other brand I’m very happy with it.
Have used 3 times on my cat (green box for cats). Every time she has not seemed herself immediately afterwards and for the next 24 hours. Each time dob of her fur falls out revealing her skin and all the liquid, while easy to syringe out, spreads out oily all over her fur. I'm not using this anymore, burning fur off is cruel. lt's a strong chemical I wouldn't even inject on myself. Show details
Difficult to apply on my long haired cat Strong solventy smell Cat was sick for a few days after application and was super sensitive about being touched anywhere near the application site Show details
Ditch Revolution and get Nexguard – My cats hated & reacted violently to the Revolution/+ , running around blinking crazy & body jerking. But the Nexguard Spectra has no smell and is very gentle.. no running, blinking, jerking, nothing.. just top protection ordered via Vets Supply for best price. Show details
AN AMAZING PRODUCT – Such an amazing product. I feel safe when my dog is on these products especially in the hot QLD weather. It’s such a simple product for my dog to take. Show details
Find out how NexGard Spectra compares to other Heart & Intestinal Wormers
Know better, choose better.
Didn't protect our dogs from heartworm – Absolutely devastated! We adopted our 2 goldens back in 2020, and after a full health check with blood work, they were both given a clean bill of health. We started them straight on NexGard & HeartGard, then changing over to Spectra in Nov 2021 ... Fast forward to today 22 Jan 2025, just came back from the specialist (referred there by our vet… Read more
after one of them had been coughing for a few days) and both have tested positive for heart worm! ... Treatment costs will range between $2,000 - $5,000 per dog depending on x-rays & scans. Of course we will do the treatment, but I was under the mistaken impression that Spectra would provide full protection.
Made My dog very sick don't use – DONT USE THIS PRODUCT. I was giving my king charles spaniel this product once a month and I noticed 2 days after he would be very sick and have diahorrea. We had to keep taking him to the vet for treatment. I realised the pattern was that it would happened everytime I gave him this chewy. Now reading all the horror stories on this website I will… Read more
NEVER give it to my dog again. It should be taken off the shelves :( I'm sorry for all the people who left reviews who's dogs have suffered or died. Do Not Use!
Nexgard should be banned – Nexgard Spectra gave my puppy diarrhea, vomiting and seizures. No warning from vets or at time of purchase from Pet shops. Check the side effects as these flea and tick prevention products have killed thousands of dogs, just google Nexgard side effects and adverse reactions, it’s Russian roulette if your dog reacts or not. These seizures are ongoing and seem permanent for 2 years now. I wish I was warned not to use this poison on our puppy. Show details
Bad taste and bad packaging – My silky refuses to eat this - please improve palatability. Also why is it so hard to remove from packaging? I hurt myself every time even when using scissors to stab at it and destroying the tablet in the meantime. Show details
I Will continue to buy this amazing product – Highly recommend NexGuard Spectra to keep our dogs safe from environmental nasties!! I used to have cooperating issues of my dog eating tablets, but these chews are flavoured so my dog loves them as a treat and I don’t even have to hide them in his food! I will continue to buy this product for my pets Show details
Be careful – Was wondering why my dog would lose his appetite after he had eaten nexguard, also would shake like he was shivering & his back leg would go funny. Am glad I found the Facebook page spreading information about the toxicity of this stuff... I just wish I had of known of this information earlier. Do your research. Show details
Works perfectly – Can’t believe Iv actually found something cute my dogs mange/mites spent hundreds here in uk for my dasch no side effects apart from her coat coming bk to full health hope this continues Show details
Minus stars for Nexguard – Gave my 6 months Cavoodle this twice in the past two months and he had been sick both times. No appetite, diarrhoea and just generally unwell. Spoke to Vet who confirmed it was this product and to stay well away. Show details
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