Comments on Bravecto: Prevention or Killer? How does bravecto work?

I gave my male cat Bravecto last Oct 14, 2017. He has always been a healthy energetic boy but within only a few hours he was walking around very slowly, he didn’t want his meal, he slept almost 12 hours. This lasted two and a half days with no energy and not eating, then he slowly began getting back to normal. I immediately suspected it was Bravecto caused but my veterinarian had never had an animal with those symptoms that were brought on from using Bravecto, I still suspected the product to be the cause.
Fast forward to March of this year, my cat was losing a lot of weight, blood was drawn and tested and his liver Alt level was way off the chart. By late April he was ill acting again. An ultra-sound was done and an abnormality was found on his liver. He had surgery to remove and test the tumor, luckily it tested benign. As I’m writing this account (6/19) of what happened to him, he has just recently started feeling and acting normal again, he is eating extra amounts of food and putting some much needed weight back on.
I can’t prove my feeling that his recent, serious health issue was caused by the Bravecto. I will never use it again and would caution all pet owners to find another safer product to rid their precious little loved ones from fleas and ticks.
I will mention also that their was a high dollar cost spent with everything that was done to get him healthy again.

I've been using Bravecto on my two KCCs for the last 18 months and neither have shown any negative symptoms. It has kept all ticks at bay, in fact I have not had to remove one tick from either of them. Prior to Bravecto was using the topical crap that never worked. I was pulling up to 20 ticks a day off my dogs. I figured the topical solution was still going in to their blood supply and that stuff has been around for years. We could blame every illness and condition on the treatments we feed our animals. You could even blame food, genetics. Until there is a firm case that Bravecto kills dogs then I will continue to use it. At least they won't die from a tick.

I took my three yr old cat to vet for bravecto...no flras seen just prevention. She lost haur around neck immediately...and paced the floor all night...but seems ok today?

co incidence is not proof of cause and effect. It might be a basis for suspicion, but proves absolutely nothing.
I do not know if the drug was responsible for the lymphoma, and neither to do you.
And I am not arguing that your conclusion is wrong or impossible, but my argument is that when more relevant data points are considered using the scientific method, the data does not support the conclusion of cause and effect, making that conclusion very unlikely.
I am sorry for your dog and your loss, as I have a very high affinity for nice dogs, and know the pain of loss.
However, the reported incidence of lymphoma appearing shortly after other doga took the drug is very very low, so that cause and effect which you seem to feel is proven, is actually not very likely.. This low reported incidence of this possible cause and effect, does Not prove anything about your dog, but if the drug caused your dogs disease, it is a very rare, thus unlikely event.
Applying scientific principles to the analysis of data often gets results which seems at odds with "common sense", but conclusions based upon the scientific analysis are much more likely to be correct than the apparently obvious common sense conclusions.
None of these observations proves or disproves your conclusion that the drug caused the lymphoma, but if that occurred the available data supports the conclusion that effect is very rare.
Unfortunately, scientific analysis is a very conservative way to analyze info, and it is often slow, and often seems to give results which are different that the "obvious" but scientific analysis is much more likely to be correct, than jumping to the "obvious" conclusion with only a one or a few data points. Statistical analysis of the data and the way it is processed will give good information about the probability of a conclusion is justified by the data, but don't bother in this situation as valid statistical analysis requires many more data points than the one you have noted in this situation, as the basis for your conclusion that this drug caused the lymphoma.
Sorry about your loss, but angst, pain about a co incidence are not a very good basis upon which to draw conclusions about the likelihood (probability) of cause and effect.

My healthy happy , active, four year old Jack was given Bravecto, he was different after receiving this poison. I was away and it was given to him by our Vet. I could see a change in his behavior, loss of interest in food, walks, started salivating, and then the shortness of breath. Last week took him too the vet, and he looked at his gums which were pure white. He told me he had been poisoned with rat poison. An X-ray showed his lungs were full of blood, and they put him on Vitamin K. Yesterday I took him back as he was looking bad, they immediately gave him a blood transfusion and said he has terminal sarcoma. Now I could not understand how a robust healthy dog could deteriorate so quickly, then I remembered that whilst I was away he was given Bravecto, as I looked on the Internet, I see that other dogs have had the similar problems, which leads me to believe that this CRAP POISON has killed my dog.

This Bravecto killed my cat in the first dose within 48 hours. Had shock, seizures, and vet couldn't save her. Merck was contacted and contacted the vet but think twice before you use this product. They need a way to test reactions before you give a full dose of this poison. All of these types of drugs seem to have serious side effects on some animals and you can't tell what will happen. Some, like Advantage, cause lethargy and worse. Death is a bad side effect to have. Killed a loving and great kitty before her time. We only switched from Revolutions because it irritated her skin at application site. Guess that's a small side effect versus this one. If you are somewhere where fleas are not a big issue, might consider not using any of these poisons unless they really need it. Maybe work with the vet on small dose to gauge reaction. I wish I had done something else.

This product KILLED my cat! Gave her the topical dose and next morning she became lethargic, then severely sick. Vet gave her IV's etc. and she seemed like might get better overnight but then at vet in morning she had two seizures and died. Healthy, 10 year old lovable companion. Nice side effect - DEATH.

My beautiful GSD puppy of 5 months started getting progressively worse and frequent seizures about a month after getting Bravecto, which was recommended to us by 2 vets. We moved to a farm and was scared of him getting fleas and ticks. I don’t know if the Bravecto was the cause. He was not really into his food for about 2 weeks before the first seizure started. The vet put him on Pexion because she thought it might be epilepsy. The seizures got more frequent and he was like a little zombie because of the meds. After a heart wrenching 3 weeks during which he ended up on more seisure meds and a Valium drip to try to control seizures which occurred with 15 minute intervals, he was taken to a specialist vet who said that nothing could be done for him and that he probably had a brain tumour or sist which had already done irreparable damage. At that stage he didn’t recognise us and could barely walk. We put him out of his misery. I am shattered.

Wow ! I never would have doubted if my dog did not throw up today after intaking Bravecto after his vet visit today. It is not his first time taking Bravecto. But the times before I just thought he didn't really like that taste, because I thought after all this is not a treat it is a kind of "medication" for him. Even humans like us would know that something that came from the clinic or hospital does not taste as good as intaking some ice cream. Today, I was just changing my dog's diet for the first day, and I mixed his old food with the new one, and added pumpkin puree as well. And after his meal, I gave him the Bravecto pill. But about a two minutes later, he threw up alittle along with his food. I already thought would it be the new food that he did not like? But after another two minutes, he threw up even more along with food. I couldn't tell if it was the food or the pill's problem, so I researched about it just so I can be sure what my next steps should be. I realized it after reading some researches answers, and came up to this. I have a bigger chance of thinking that it is because of the pill. I really hope this won't make him sick internally, because all this time I did not know that taking flea pills is so bad for them. And I never thought that this could make any more sense to me than anything else. This is toxic/pesticide which I am giving to my dog!! So should I be sure that it was the pill and not the new food that made him vomit? Can someone tell me so I have a peace of mind?? =(

This is all happening now and I am very worried.
We have 2 dogs and 4 cats. One of the dogs, Billy, had a flea allergy. Everyone was itchy and scratching. My vet told me that the only way to get rid of the fleas was a flea treatment and Bravecto was recommended.
I gave the 2 dogs and 3 of the cats Bravecto on Christmas day. 9 days after giving them Bravecto all 3 cats are lethargic, barfing, and not eating.
We brought the first cat that got sick to the vet last Sunday to make sure there wasn`t an obstruction - there wasn't ($400 for that visit) nothing, besides the Bravecto, in our house is new.
Now on Tuesday the other 2 are sick acting the same way. It has to be the Bravecto.
The forth cat has Phemfigus and recently had hip surgery for hip dysplasia and I didn't want to give him Bravecto but he started getting flea bites on his head and i was assured by his vets that his conditions were not contraindications for Bravecto so I dosed him about a week ago. I'm afraid he is going to get sick too and won't be able to fight it.
Will my cats be ok? They are not eating even their most favorite foods. Tgey seem hungry but then don't eat. Kevin drank some chicken liver water but within minutes, threw it up. They drink water. I made some organic chicken bone broth and I'm hoping they will drink that when it cools. Should I force feed small amounts of baby food - meat? Is there something I can do to help them?
The dogs seem ok so far.
I am so upset that I poisoned all 6 of my animals. Never again will I use Bravecto or anything like it.
Any advice to help them make it through this?

I have never given my dog any flea / tick / heartworm pesticides.
She now has lyme disease from ticks.
What is a person to do? I am totally against pesticides, neurotoxins, in my dog's body.
I asked the vet if bravecto (or any of the others) were recommended to them to take to prevent the host of bugs that bite humans (mosquitos, black flies, deer flies, horse flies, no-see-ums...) would they take it. Big fat NO.
Repetitive lyme exposure and disease is not a healthy option for pet longevity either...
Reading your post on non-toxic flee / tick control. I confess, I have tried many of the natural options: external essential oil application (has to be used every time she goes outside) and internal supplements - never seen any sort of results from any of the internal supplements (garlic, brewers yeast, nutritional yeast...)

I took my 15lb Shi Tzu in for an annual exam. I have given him other chewables for fleas. we have a flea problem where we live. We tried Bravecto sunday afternoon. Monday while I was at work, my little guy started acting different. Monday by 3:30pm he passed away. This was the only thing different he had ingested. It is a horrible feeling knowing I possibly contributed to his death. It could have been prevented.

And yet my vet still maintains this is a safe, effective alternative, even today. He says there have been no problems with Bravecto out of all the animals they have prescribed this to, and he and everyone else in their office will keep their pets on it. Looks like I'm throwing out $100.00 worth of meds I bought ahead for the spring...........

Bravecto killed my dog,, one dose is all it took! He suffered for 16 months until I finally could no longer watch him get worse each month. First he almost lost the use of his hind legs, uncontrollably thirst, extensive hair loss, his skin turned to rubber, tumors started on his lower spine. He started having involuntary body movements.

REST IN PEACE AT THE RAINBOW BRIDGE MY LITTLE ONE.

I just lost a cat I rescued from being poisoned in 2012 by a Ronkonkoma complex I lived in, only to die 5 years later from Bravecto. My mom had adopted him and because of hurricane sandy hitting Amityville so hard moms home got fleas. She fought the fleas with standard methods. Then her vet gave Chowder who was about an 11 - 12 year old cat the Bravecto spot on treatment. Within 10 days we had to euthanize him. I have never seen such a horrible death for such a beautiful tabby cat. It started the following day after treatment with the Bravecto he stopped eating. The second day he was hiding in the corner of the room crouched down. He wasted away in the days following and kept trying to void and defecate but could not. He couldn't stand up at all lost all strength and went from 13 lbs to 7 lbs in 7- 10 days. Yesterday we had no choice but to euthanize him he was suffering so badly. The first vet blamed it on a tumor he wasn't sure he could see clearly or tell if it was benign on the xray but the liver enzyme was elevated. I got to see him on the 8th day and tried all of my holistic knowledge taught to me by a holistic vet and my background in Chinese medicine which wasn't much. It was too late he had no spirit left and I held him as we went through the euthanasia process. He had liver and kidney failure but it was the speed in which he deteriorated that was so disturbing. I believe this product should be banned. He had a dose of antibiotics which didn't help his immune system and I tried kefir and Ginger with raw honey just on the tip of my finger to try to get him to drink but his tongue was unable to lick it was as if it were paralyzed. The first vet had given him a derivative of milk thistle but the pill was too nasty to administer. When we took him to another emergency vet on Sunday 11/5/17 to be Euthanized it did not even take a full dose of sedative plus the euthanasia drug and he was gone that quick. We will never forget this horror, the look in his eyes begging for help nor will we ever forget chowder. He was a robust and lively cat before the Bravecto and the vet tried to say it was cancer. Well we will never really know but I am heartbroken and so is my mom.

Do not give bravecto to your babys. After giving the second dose one of my boxers started panting all the time we just thought maybe he was hot, or just being deuce. Then he started throwing up, diarrhea, acting confused slept a lot so I took him to the vet and they said it was an infection. We got home and he started having seizures and sensory problems, loud noises made him jump, touching him made him jump. So I took him back in that afternoon they did blood work and said he had lived failure. From time he started throwing up until he passed was four days. My other two dogs are showing side effects, like sneezing, a little trouble walking i am detoxing them now and will never give them anything else, I can't bring deuce back but if just one person reads this and he saved one life then that's better than none. This medicine is poison and you are killing your dog if you give it to them.

Has anyone experimented with using a partial tube of the drops on a cat? I'm wondering if the dosage may be so strong that the liver/pancreas can't handle it all at once. Might be less damaging if given in small doses? I purchased it to use on my cats, but am now reluctant.

My 9 year old mastiff Bella had what the vet thought was skin bacteria. So she was given antibiotics and anti fungal shampoo. Then it didnt work for 2 weeks. So the vet again prescribed a stronger antibiotic, and also had her take a bravecto. He said in case it was demodex mange instead of folliculitis the Bravecto would work for the mange.
My dog suddenly died one morning. Gums were all white. Vet said she must have had organ failure to have lost so many red blood cells overnight.
I now think I figured out what happened. It was bravecto.
I am so devastated.

Gave bravecto to my dog...and within the promised time frame...his flea and ticks were gone.
Thanks bravecto!