Is Nexgard causing my puppy's vomiting, diarrhea, shaking, lethargy?

That could happen after administration of Nexgard, even though is quite unusual and it is more likely to be dietary related. I would suggest to withhold food for the next 4 hours and then start feeding with a bland diet based on boiled chicken and rice in small portion every 6 hours for the following 48hours. Then gradually reintroduce the normal diet over 5 days. I would definitively recommend a veterinary check up if the signs persist or you notice diarrhea, vomiting, lethargy or inappetence.

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Lucy! I always recommend the first time giving nexgard and heartgard to separate them out by 2 days in case there is a reaction we know which drug it could be. Both have the potential to cause an upset stomach. Also having intestinal parasites can cause vomiting and diarrhea. The heatgard kills round worms so that could be why Lucy passed the worm after you gave the medication. Sadly both are possible causes for her upset stomach. Usually all quickly resolve. Just watch her closely for the next several hours. If she continues to vomit or won't eat this morning I would call your Vet when they open this morning and have her seen before they close for the weekend. Good luck!

Hi, thank you for using Petco Pet Education Center, formerly Petcoach. Poor Myla, it sounds like she is having a bad time. The hairloss can occur from both ringworm and Demodex. Lethargy and loss of appetite could be a possible side effect of nexgard or can also be side effects of any antibiotic and antifungal medications she may be on. As long as she is relatively alert and active, then I would contact her regular vet in the morning to discuss your concerns. If she is severely lethargic, hasn't eaten at all in more than 12 hours or showing other signs of illness then I recommend taking her to an emergency vet tonight to have her checked out. I hope she's feeling better soon.

Yes. Like all medications, there can be side effects, including vomiting and diarrhea. Here is the product insert that discusses everything about the medication. Look at the section called "Adverse Effects": https://nexgardfordogs.com/assets/NexGard_PI.pdf

Poor pup! Nausea is less common with Nexgard than with some of the other oral flea meds available (such as Comfortis or Trifexis), but can still happen in some dogs. Normally, giving the pill with a meal helps to prevent this, but it doesn't sound like it's helped much for your dog. It normally doesn't matter what type of food you give it with, because the purpose of giving with a meal is to slow absorption of the medication so that it's more gradual - it's the presence of food in the stomach that helps, rather than any specific ingredients. So if this hasn't helped with your pup, you may want to try a different medication next month - the vomiting isn't dangerous and is not a sign of toxicity problems or any other serious issues, but I know it's no fun for either of you to have him vomit every month! He might do better with Bravecto, or a topical flea/tick med such as K9 Advantix.

You did not mess up, its ok! They are both for fleas but work in different ways. Nexgard will kill the adult fleas (as well as ticks). However adult fleas are only a small part of the problem when it comes to fleas, because the eggs that may have been laid by the adult fleas will sprinkle off your dog, hatch in your carpet (eww I know) and the baby larvae will find their way back onto your dog (or other pets, or even you in very severe infestations). Sentinel renders the eggs laid by fleas unable to hatch. This article below may help explain this. Its possible that the medications may have contributed to her diarrhea today. If she is still eating, is playful and acting normally, see how she is in the morning, and let your vet know she had some diarrhea. Your vet may advise against giving them at the same time if he or she suspects that may have contributed. But the sort answer here it, you did not mess up. If the diarrhea is continuing to be severe, if she's vomiting, or acting dumpy at all, please see a vet tonight. https://www.petcoach.co/article/how-to-prevent-a-flea-and-tick-infestation/ Thanks for asking PetCoach! I hope that helps!

Thanks for using Petco Pet Education Center, formerly Petcoach! I would not recommend that you switch him yet as this may be completely coincidental. Nexgard is a great preventative and I would give it more time before switching to something else. Hopefully the scratching is not a reaction to it as that would be quite unusual. If the itchiness continues despite giving it a few days, that would likely be due to allergies rather than a cause of using Nexgard. It really comes down to figuring out what is causing his allergies so that they can be treated or the specific allergen avoided. A secondary infection is likely and also needs to be addressed. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!