Can My Dog Take Zyrtec For Allergies? [Best Advice]

What are the main differences between Zyrtec and Zyrtec-D?

The main difference between Zyrtec and Zyrtec-D is that Zyrtec-D contains the decongestant pseudoephedrine. Also known by its brand name, Sudafed, pseudoephedrine works by shrinking blood vessels to reduce swelling and congestion in the nasal passages.

Zyrtec is the brand name for cetirizine. It is available as an oral syrup, orally disintegrating (ODT) tablet and oral tablet. Children aged 2 to 6 years old can be given the oral syrup. Zyrtec tablets can be administered to children, adolescents, and adults 6 years and older. Zyrtec can be purchased over the counter.

Zyrtec-D contains cetirizine and pseudoephedrine. It is only available as an oral tablet for adults and children 12 years and older. While Zyrtec can be found in the pharmacy aisles, Zyrtec-D is usually stored behind the counter at the pharmacy. This is because there are restrictions on how much pseudoephedrine can be sold to a person at a given time.

Main differences between Zyrtec and Zyrtec-D
Zyrtec Zyrtec-D
Drug class Second-generation antihistamine Second-generation antihistamine
Brand/generic status Brand and generic version available Brand and generic version available
What is the generic name? Cetirizine Cetirizine-Pseudoephedrine
What form(s) does the drug come in? Oral tablet Orally disintegrating tablet Oral syrup Oral tablet
What is the standard dosage? One 5 mg or 10 mg tablet once daily   One 5 mg-120 mg tablet twice daily
How long is the typical treatment? As needed for seasonal or perennial allergies As needed for seasonal or perennial allergies. Pseudoephedrine use should be limited to no more than 10 days.
Who typically uses the medication? Adults and children 2 years and older Adults and children 12 years and older


Zyrtec Dosage For Dogs

Make sure to consult your veterinarian before administering any kind of medication to your pooch. Zyrtec dosage for dog allergies will be prescribed by your vet.

It is usually dosed in dogs at 0.5 mg per pound of body weight (1 mg/kg) orally once to twice daily.

How Much Dose Zyrtec Can I Give My Dog?

This is the question that pet owners are likely to have. Other flocks wonder can you take Zyrtec twice a day. The third group of pet owners will have the question can you overdose on Zyrtec.

Well, the ideal dosage shall depend on the extent and the type of problem as well as the age of the pet.

The wisest act to set the right dosage will be to consult the Vets. Considering the intensity of the problem, the Vet would suggest the time lag between the dosage and the extent of the dosage.

In some cases, Vets suggest the serving in intervals of 12 hours and in some cases, the medicine is to be served once, daily.

However, in elderly dogs, the dosage is kept to the minimum extent to ensure that the animal finds no difficulties in withstanding the medicine.

Though the market has the availability of various types of medicines for treating allergies for dogs, Zyrtec is always the first choice of the Vets and the pet owners.

Dose For Treating Dog Allergy Symptoms

This safe and effective medicine will bring relief without triggering any notable health hazards.

However, it is important that you follow the serving instruction and dosage as suggested by the Vet. This way, you can nullify any chances of side effects and ensure the fastest healing to the troubles of allergic problems in your beloved pet.

For treating Atopic Dermatitis dosage for dogs wil

For treating Atopic Dermatitis dosage for dogs will be 0.5 mg/lb every 24 hours.

For treating Allergic Dermatitis dosage for dogs will be 0.5 mg/lb every 12 hours.

If your pet’s allergies are quite significant, the dosage may need to be higher.

However, if your pet is older, he might not be able to tolerate a higher dose. In that case, rather than giving a larger or more frequent dose, your veterinarian might recommend additional medications.

Experimental Researches – Exposure and Antihistamine Effect

The results of the study were that a once-daily dosing regimen of 2-4 mg/kg (0,91 – 1,82 mg/lbs) cetirizine per os clearly provides a sufficient antihistamine effect.

A behavioral study was also conducted and revealed no adverse effects, such as sedation.

Based on this experimental protocol, cetirizine may be an option to treat histamine-mediated inflammation in the dog based on this experimental protocol (link to US National Library of Medicine) but additional clinical studies are required.

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Why Vets Are Prescribing Zyrtec For Dogs

In case you aren’t familiar with using Zyrtec for dogs, it’s an allergy medication that can be purchased at your local drug store. It’s used to treat symptoms for people and dogs alike; watery or itchy eyes, runny noses, sneezing, hives, and itching. Its comparable to Benadryl, another well-known allergy medication but unlike Benadryl, drowsiness with Zyrtec is often very rare.

Zyrtec’s active ingredient, Cetirizine, is an antihistamine commonly used to treat itchy skin in dogs. It’s a popular prescription for canines because most dogs tolerate the medication very well and it doesn’t have the effect of leaving your pet sedated and lethargic.

With the other allergy-fighting ingredients in Zyrtec and the fact that it can be purchased over the counter, vets often prescribe it as an affordable and effective method for combating your pet’s allergies.

While Zyrtec is generally safe for dogs, there are some precautions that you should keep in mind before administering it to your animal.

Zyrtec – The Best Solution to The Troubles of Skin Allergies

The Vets and experienced pet owners hold confidence on Zyrtec for their dogs as the best allergy medication as the majority of the pooch can withstand this medicine, produce 100% elimination of the allergies as well as comes safe to the health of the dogs.

If you are yet to use this medicine, you are likely to hold the question, what is the active ingredient in Zyrtec.

The active ingredient in Zyrtec is the antihistamine that can treat issues like itching, watery eyes, runny nose and several other symptoms of skin allergies.

In addition to treating skin allergies, this formulation can produce relief from troubles triggered by dust mites or molds.

The allergic reaction to Zyrtec is almost to the negligible extent and hence, it is a completely safe and secure formulation against allergic troubles.

Questions about ZYRTEC-D®

How is ZYRTEC-D® different from ZYRTEC®?

ZYRTEC-D® contains pseudoephedrine, which relieves nasal congestion. So it relieves all the same symptoms as ZYRTEC®, plus it also has a powerful decongestant. For more, see: “What symptoms does ZYRTEC® relieve?”

How does ZYRTEC-D® work on sinus pressure and congestion?

ZYRTEC-D® contains a nasal decongestant that narrows the blood vessels in the nose and sinus region, which shrinks the tissue in that area to allow air and mucus to flow normally.

Why is ZYRTEC-D® located behind the pharmacy counter?

Pseudoephedrine, an active ingredient in some cold, allergy, and sinus products, can be chemically processed into methamphetamine (commonly known as meth). The illegal use of meth had increased, prompting Congress to pass the Combat Methamphetamine Epidemic Act of 2006 (CEMA). The objective of the law is to eliminate the use of pseudoephedrine in the illegal production of meth. By law, products containing pseudoephedrine must now be sold behind the counter and through online retailers who must meet certain requirements.

Note that products containing pseudoephedrine remain available without a prescription in most states.

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Drug interactions of Zyrtec vs. Zyrtec-D

Certain drugs should be avoided with Zyrtec or Zyrtec-D when possible. Some drugs have CNS depressant side effects that result in increased drowsiness with Zyrtec. Opioids, such as hydrocodone or oxycodone, can cause increased drowsiness and sedation when taken with Zyrtec.

Tricyclic antidepressants can also cause increased drowsiness with Zyrtec. Antidepressants may also worsen anticholinergic side effects like dry mouth. Other drugs with similar effects include anticonvulsants and muscle relaxants, among others.

Zyrtec and Zyrtec-D should not be used within two weeks of using a monoamine oxidase (MAO) inhibitor. Combining MAO inhibitors with cetirizine can cause increased adverse effects of the antihistamine. Pseudoephedrine in Zyrtec-D can also interact with MAO inhibitors, which could lead to dangerously high blood pressure.

Drug Drug Class Zyrtec Zyrtec-D
Codeine Hydrocodone Oxycodone Opioid Yes Yes
Gabapentin Anticonvulsant Yes Yes
Carisoprodol Cyclobenzaprine Muscle relaxant Yes Yes
Amitriptyline Nortriptyline Clomipramine Tricyclic antidepressant Yes Yes
Selegiline Phenelzine MAO inhibitor Yes Yes

Consult a healthcare professional for other possible drug interactions

How Common are Allergies in Cats?

Cats have sensitive upper respiratory systems, so allergies are more common than owners think. According to PetMD, Your cat can also have food-related allergies, and in some cases, a cluster of allergy-related conditions.   

What are the Types of Cat Allergies?

  • Food
  • Pollen
  • Dust
  • Mold
  • Fleas
  • Mites

Regardless of allergy type, diagnosing is often a complex process with a lot of trial and error. Sometimes, your cat will have multiple allergies too, which makes the diagnosis more difficult for your vet.

My Cat’s Always Eaten the Same Food. How Could it Cause Allergies?

This is a common misconception with feline allergies (canine too). Allergies can develop suddenly or over time, which answers the question.

Scientists and vets tend to disagree on how and why a cat’s body will suddenly see a substance as an invader, but they both agree that it does happen.

We Have Multiple Cats but Only One has Food Allergies?

Not every cat will have the same allergies or allergies period. However, in a multi-cat household, you should feed all of the cats the same food and treats if possible.

Otherwise, you might need to feed your non-allergic cats in an area off-limits to your cat with food allergies.

Some cats have severe allergies to the point where breathing in the allergen will trigger a response. In multiple pet households, this can pose a real threat.

One of our staff has a dog with severe food allergies, for example. He can’t have chicken, turkey, pork, beef, wheat, corn, soy, eggs, or rice. When she adopted a cat, she had to feed the cat a similar ingredient diet (strictly fish-based cat food) to avoid triggering her dog’s allergies.

It doesn’t take much either to set off their allergies, so cross contamination is a real concern for your kitty’s overall wellbeing.

What to Do If Zyrtec Doesnt Work

Your child might not respond to Zyrtec. If it doesn’t provide allergy relief for your child, look into alternative allergy medicines. These include Allegra, Claritin, Clarinex, and Singulair. Don’t forget about steroid nasal sprays, either. If your child is old enough, Flonase, Nasonex, or Rhinocort Aqua may be prescribed by your healthcare provider.


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