Does NexGard Make Dogs Sleepy?
Read this blog to know - Does NexGard Make Dogs Sleepy?

NexGard is one of the most popular flea and tick preventatives on the market, but some pet owners have raised questions about potential side effects. One of the most common concerns is whether NexGard makes dogs sleepy. As responsible pet parents, it's essential to know how any medication might affect your furry friend. In this article, we'll break down everything you need to know about NexGard, its ingredients, potential side effects, and whether sleepiness is one of them.
What is NexGard?
NexGard is a prescription-only chewable tablet used to prevent and treat flea and tick infestations in dogs. It’s a convenient monthly treatment designed to eliminate pests that can lead to discomfort and more serious health issues for your dog, like Lyme disease. The key selling point of NexGard is that it's easy to administer—just one tasty chew and you're set for 30 days of protection!
How Does NexGard Work?
NexGard works by targeting the nervous system of fleas and ticks, paralyzing and eventually killing them before they can harm your dog.
Active Ingredient: Afoxolaner
The active ingredient in NexGard for dogs is a compound called afoxolaner. This ingredient is part of the isoxazoline family and is known for its effectiveness in killing external parasites like fleas and ticks. Once ingested, afoxolaner is absorbed into your dog’s bloodstream, and as soon as a flea or tick bites, they’re exposed to it.
Common Side Effects of NexGard
Like any medication, NexGard comes with the possibility of side effects. While many dogs tolerate it well, others may experience mild to moderate reactions.
Gastrointestinal Issues
Some dogs may experience vomiting or diarrhea after taking NexGard. This is typically temporary and resolves within a few hours.
Neurological Concerns
In rare cases, NexGard has been reported to cause neurological symptoms such as tremors or seizures, particularly in dogs with a history of neurological disorders.
Does NexGard Cause Sleepiness in Dogs?
One of the more debated side effects among dog owners is whether NexGard causes drowsiness or sleepiness in dogs. While the product’s official documentation does not list sleepiness as a known side effect, some owners have reported their dogs acting more tired than usual after taking the chewable tablet.
Studies on NexGard and Sleepiness
Currently, no scientific studies specifically indicate that NexGard causes sleepiness in dogs. However, anecdotal evidence from dog owners suggests that lethargy may occur in some cases.
Why Some Dogs Might Seem Sleepy
If your dog appears drowsy after taking NexGard, it could be due to other factors. For instance, stress from the treatment itself or pre-existing health conditions may cause temporary lethargy. It's also worth considering that any slight gastrointestinal discomfort could make your dog less energetic.
Recognizing Normal vs. Concerning Side Effects
It’s essential to differentiate between normal reactions, such as slight lethargy or a brief period of upset stomach, and more concerning symptoms. If your dog seems excessively tired or displays additional worrying signs like persistent vomiting, diarrhea, or tremors, contact your veterinarian.
Other Possible Side Effects of NexGard
While NexGard is generally safe, there are other potential side effects to be aware of.
Skin Reactions
Some dogs may develop itching, redness, or rashes at the site of flea bites or due to the medication itself. If this happens, consult your vet to rule out an allergic reaction.
Changes in Behavior
If your dog starts behaving differently after taking NexGard, such as being unusually quiet or restless, it could be a mild reaction to the medication. However, sudden and severe changes in behavior are a red flag and should be discussed with a vet.
How Long Do NexGard Side Effects Last?
In most cases, any side effects from NexGard, including mild lethargy or gastrointestinal upset, should resolve within 24 to 48 hours. If symptoms persist, it's a good idea to check in with your veterinarian.
What to Do If Your Dog Feels Unwell After NexGard
If your dog seems unwell after taking NexGard, monitor them closely. Offer plenty of water, and keep them comfortable. If symptoms like severe lethargy, vomiting, or tremors last longer than a day, it's crucial to seek professional veterinary advice.
Can Sleepiness Be Linked to Other Factors?
Age and Breed Considerations
Older dogs or certain breeds might be more prone to feeling tired after taking NexGard. Dogs with pre-existing conditions could also experience different reactions.
Concurrent Medications
If your dog is on other medications, sleepiness could result from drug interactions. Always inform your vet about any other treatments your dog is receiving.
Preventing Fleas and Ticks with NexGard Safely
To ensure your dog stays protected without unwanted side effects, always follow the correct dosage instructions. Avoid giving NexGard to dogs that are underweight or have known allergies to its ingredients.
How to Administer NexGard Correctly
Giving NexGard is simple—just offer the chew as a treat or mix it with food. Be sure your dog swallows the entire dose to ensure full effectiveness.
Comparing NexGard to Other Flea and Tick Treatments
While NexGard is effective, other treatments like topical solutions or collars might be more suitable for some dogs, especially those with specific health concerns. Always consult your vet for the best option.
When to Contact Your Vet
If your dog shows prolonged signs of lethargy, digestive issues, or neurological symptoms, it’s important to consult your vet immediately. Early intervention can prevent more serious complications.
Conclusion
In summary, NexGard is a highly effective flea and tick prevention option for dogs, but like any medication, it may come with side effects. While sleepiness isn’t officially listed, some dogs may experience mild lethargy after taking NexGard. If you notice any concerning symptoms, always reach out to your vet for advice.
FAQs
Can NexGard make dogs sleepy?
While sleepiness isn’t a common side effect, some dogs may experience mild lethargy after taking NexGard.
How long does NexGard stay in a dog’s system?
NexGard remains effective for 30 days, offering continuous protection against fleas and ticks.
Can I give NexGard to my dog with food?
Yes, NexGard can be given with or without food, and many dogs find it palatable on its own.
What should I do if my dog vomits after taking NexGard?
If your dog vomits within a few hours of taking NexGard, consult your vet to see if a replacement dose is needed.
Is NexGard safe for all dogs?
NexGard is generally safe but should be avoided in dogs with known allergies to its ingredients or those with a history of seizures.

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