Can Dogs Have Nyquil? 5+ Dangerous Ingredients

For years, NyQuil has been referred to as “the midnight sniffling, sneezin’ and coughin’ and hurting, fever, finest sleep you’ve ever had with a cold drug”.

Is this medicine something you’d like to use on your dog?

I’ll get right to it:

Not even if you’re instructed by a reliable veterinarian. There are too many dangers to be taken otherwise. Seriously!

NyQuil isn’t safe for animals in general. All forms of this anti-influenza medication are harmful to dogs.

Because it’s so easy to understand. There contains an active hazardous chemical called Acetaminophen, which is easily dangerous to humans.

NyQuil Could Harm Your Dog

DayQuil is in the same boat.

By feeding your dog NyQuil Cold & Flu on its own, you run the risk of making a mistake you’ll be sorry for down the road

Naming NyQuil Versions

There are at least ten distinct NyQuil formulations, nine of which contain Acetaminophen, according to our study.

For the sake of your dog, it is imperative that you know exactly what kind of food you have available. The drugs in consideration are as follows:

  • SEVERE Cold and Flu LiquiCaps by NyQuil
  • LiquiCaps for Cold and Flu Relief at Night
  • Liquid Cold & Flu Reliever for the Nighttime Use
  • Cold & Flu Medicine for High Blood Pressure
  • Liquid Alcohol-Free Cold & Flu Relief
  • VapoCOOL Nighttime Cold/Flu Relief for SEVERE (caplets or liquid form)
  • Not one of the above choices is suggested!

Their website claims that their cough suppressant is the only one that does not include Acetaminophen. That one isn’t a good idea, either, because it’s a risky one that might harm your dog.

can dogs have nyquil

Solution For Suspected Allergies

Have you thought about the possibility that your pet’s condition may be caused by an allergy?

Redding Ochoa (DVM) gave the following advise about allergies:

When your dog has difficulties sleeping, you could try giving him Benadryl. This frequently aids a youngster in getting a good night’s rest. The dog will be more relaxed if you play soothing music in the background while anything bothers them (such as a very loud rainstorm).”

Acetaminophen In Focus

Acetaminophen is typically ineffective in animals, including dogs and cats (who are considerably more sensitive). This is a dangerous circumstance, as the medication is swiftly absorbed into the digestive system.

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Doses over 40mg/lb of animal body weight can readily lead to acute poisoning.

There are a number of ways to tell whether your pet has been poisoned by NyQuil (or any other acetaminophen-based medication):

  • Diarrhea
  • Nausea
  • Vomiting
  • Lethargy
  • Gums with a blue hue
  • Anxiety-filled breaths
  • Swelling
  • Urine with a bluish cast is considered

Consult your veterinarian right away if your dog accidently ingested a NyQuil bottle. They are the only ones qualified to provide you advice on your future steps.

Learn more about Acetaminophen by clicking here!

Safe Treatment Technique

Instead of providing NyQuil to a stuffed-up pet dog, try these alternate options:

Put them in a steamy bathroom or use a humidifier. For example, it may assist to cleanse the nasal passages or remove the mucus in the lungs by doing so

Why NyQuil Is Bad For Dogs

Acetaminophen, the primary component in most varieties of NyQuil and DayQuil, is toxic to dogs.

Acetaminophen is a common ingredient in a wide range of NyQuil formulations.

It’s NyQuil Severe Cold and Flu,

Nighttime Cold and Flu Relief (Liquid and Capsules)

Cold and flu are two of the most common ailments for people with high blood pressure.

Liquid Alcohol-Free Cold and Flu Remedy

VapoCool Nighttime Cold and Flu Relief for the Most Serious Cases (Liquid and Capsules)

Dogs should never be fed any of these at any time.

A non-acetaminophen NyQuil Cough Suppressant is the only NyQuil that isn’t instantly harmful.

If you want to feed it to your dog, don’t do it!

Despite the fact that your veterinarian may only consent to prescribe it on rare occasions, there are various less harmful treatments for dogs.

Why Acetominaphen is Dangerous

While acetaminophen is good for many human diseases, it is poisonous to dogs.

The liver, intestines, and red blood cells might be harmed if it is taken orally.

Dogs may also have facial swelling, darkening of the gums, vomiting, and a lack of appetite as a result of rabies.

If a dosage of 40mg per pound of bodyweight is taken, acute poisoning can result.

If your dog is having an adverse response to acetaminophen, he or she may show the signs listed below.

  • Lethargy
  • Nausea
  • Vomiting
  • Swelling
  • The color of the urine has changed.
  • Anxiety-filled breaths
  • Gums with a blue hue
  • Diarrhea

If your dog is showing any of the following symptoms, contact your veterinarian or the nearest animal hospital immediately.

If you don’t know what you’re doing, don’t take acetaminophen.

Another reason why acetaminophen is so harmful is that it may be absorbed into the circulation in only 30 minutes.

This implies that if your dog has overindulged, you’ll need to act quickly.

Even if a few pills won’t do much harm, a hazardous response is more likely in a smaller dog.

Other Dangerous Ingredients

NyQuil products include acetaminophen, but there are a number of additional substances that might be harmful to dogs.


In certain cases, this chemical is used as a cough suppressant for dogs, and it is safe for dogs.

While this might be beneficial, over use can have serious repercussions.

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Toxic reactions can occur in dogs if they are given more than 0/5mg per pound of weight.

Over-excitement, disorientation, hard breathing, vomiting, and diarrhea are all symptoms of this.

Doxylamine Succinate

Cold and allergy symptoms might be alleviated with the help of this antihistamine.

Unless consumed in huge quantities, it is safe for dogs even though it is rarely used.

Dextromethorphan is a good example of an antihistamine that should not be used in larger doses than 1mg per pound of body weight.

Nephrotic syndrome, ataxia, hyperexcitation, and seizures are all frequent adverse symptoms of a benzodiazepine overdose.


The expectorant properties of this substance aid in the clearing of the respiratory tract of phlegm.

As with the aforementioned, it is only safe at particular amounts dependent on body weight.

Approximately 50mg per pound of body weight.

Some possible adverse effects include irregular breathing, tremors, muscular spasms, and stomach pain if the prescribed dosage is exceeded.


Decongestants can be dangerous for dogs, therefore it’s best to avoid giving them this one.

Toxic reactions can occur at concentrations as low as 0.1mg per pound.

Ataxia, tremors, seizures, changing body temperature, irregular heartbeat, hyperactivity, and vomiting are among the most typical symptoms of a hazardous response.

A vet or the Animal Poison Control hotline (888) 426-4435 should be contacted if your dog has consumed any NyQuil products that include these additional components.

Will NyQuil Hurt My Dog?

Three things determine whether or not the NyQuil your dog ate may hurt him: the version in issue, the amount consumed, and your dog’s height and weight.

NyQuil comes in a variety of forms, tastes, and formulas, each oriented toward a certain audience or purpose.

You may find some examples here, such as the NyQuil ‘VapoCOOL’ which is ideal for individuals with a dry, scratchy, or painful throat.

So… What Happens If My Dog Ate NyQuil?

Even though it’s never a good idea to give your dog medicine that isn’t intended for them, if they just ate a few of the capsules and not the entire package, they should be alright.

On top of that, NyQuil’s harmful effects are highly dependent on the dog’s weight and height.

What Should I Do If My Dog Ate NyQuil?

In the event that your dog has unintentionally swallowed some NyQuil pills, you have a few options for keeping him safe and well.

How Do I Prevent My Dog From Eating NyQuil In The Future?

Keep your dog from accidently ingesting NyQuil at all costs so that you can keep it safe.

In order to accomplish this, you can:

It’s best to keep all of your prescriptions out of the reach of children by placing them on high shelves or in locked cabinets.

Do not leave any medication on a counter or bedside table alone.

Before attempting to find the pill, you should confine your dog to a safe area. Before letting your dog out again, locate the medicine first.

The best way to keep your dog from exploring the house to satisfy his curiosity is to keep him cognitively active and entertained.

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Spilled medicine should be cleaned up very once, and any leftovers should be disposed of in a closed container.

Refrain from administering human drugs to your dog without first consulting a veterinarian.

Use these pointers and your common sense to maintain your house a joyful and safe environment for your pet.


If your dog ingests NyQuil, its toxicity and potential side effects will be determined by several factors, including the precise formulation, dosage, and the dog’s general size and weight.

NyQuil is generally safe for dogs to ingest (albeit a bit sleepy and with a spot of stomach discomfort). You may need to be more careful in the event that your dog is a little or toy breed, or if it ate a high number of capsules.

As a result of liver and red blood cell destruction, symptoms of NyQuil toxicosis include hard breathing, tremors, agitation, and seizures. It’s advisable to get your dog checked out by a veterinarian right away if any of these things happen to him.


It is relatively safe even for canine use and is usually given at a dosage of 0.5mgs per pound of body weight for relief of bronchial irritation. If a higher than usual dose is ingested, common signs of toxicity include sleepiness, decreased rate of breathing, confusion, excitement, vomiting, and diarrhea.
Even over the counter drugs like Nyquil and Midol contain ingredients that are very toxic to dogs and cats.
If your dog is congested or has a dry nose from a cold, you can give them pediatric or saline nasal sprays. Don’t use any other type of OTC nasal medication unless prescribed by your veterinarian.
According to the ASPCA, cold and flu medicines for people could be fatal to your pet. Over-the-counter and prescription pharmaceutical products, used to ease symptoms of winter-time sickness and other ailments in humans, contain ingredients that are deadly to dogs, cats, and other pets.
Princy Hoang
See more articles in this category: Dogs

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