Thursday, 7 November 2013

Quercetin - Alternative Medicine for Dogs and Cats - Benefits, Interactions, Dosage

In this article...

1. Quercetin

2. Health Benefits

3. Cautions

4. Side Effects

5. Drug Interactions

6. Administration and Dosage

Safe for dogs and cats when taken for short-term periods
i.e. up to 12 weeks at a time with a break in-between
prior the next course of treatment

1.0 Quercetin

What is Quercetin…

Quercetin sometimes called nature’s Benadryl, is a naturally occurring flavonoid found in many plants. Flavonoids (or bioflavonoids) are plant-pigments that play an essential role in attracting pollinators to plants.  Flavonoids also offer a host of beneficial properties to humans, dogs, cats and other animals. Quercetin is:

  • Anti-allergenic;
  • Anti-carcinogenic;
  • Antifungal;
  • Anti-Inflammatory;
  • Anti-microbial;
  • Anti-viral.

Quercitin can be found in rich concentrations in some fruits, vegetables and herbs – for example…

  • Apples (fresh);
  • Berries;
  • Bananas;
  • Broccoli;
  • Cherries (dark);
  • Garlic (fresh);
  • Grapefruit (particularly white grapefruit) and grapefruit seed extract;
  • Green tea;
  • Ginkgo bilboa;
  • Chamomile tea;
  • Parsley;
  • Summer squash;
  • St. John’s Wort.  

Quercetin is Available In Supplemental Form…

  • Capsules;
  • Drops;
  • Pills;
  • Powder;
As quercetin can sometimes be difficult for the body to assimilate, taking Bromelain (pineapple derived digestive enzyme) with quercetin can add absorption;
  • Bromelain also works to inhibit histamine; 
  • The ratio of intake is ¼ to 1/3 the amount of bromelain to quercetin. 

2.0 Health Benefits
 A partial list...
  • Anti-allergen…
    • Asthma (an inflammatory disease);
      • Quercetin minimizes the degree of constriction that occurs as it moderates the constriction of bronchial tubes.
    • Environmental allergies
      • Dust and dust mites;
      • Chemical-based cleaning products;
      • Insect bites;
      • Insect and parasite preventatives  - chemical based;
      • Grass and wild flower (weed) pollens;
      • Trees and tree pollen;
      • Mould , mushroom, fungus spores;
    • Food Allergies;
    • Quercetin’s anti-histamine, anti-inflammatory, anti-oxidant properties work together to turn-off histamine production and suppress or reduce inflammation and itching.
  • Anti-Inflammatory;
  • Atherosclerosis - hardening of the arteries, (an inflammatory disease);
  • Blood Conditions;
  • Cataracts;
  • Cancer prevention;
    • Breast cancer;
    • Colon cancer;
    • Endometrial cancer;
    • Ovarian cancer;
    • Prostate cancer;
  • Chronic fatigue syndrome;
  • Diabetes;
  • Heart conditions and heart disease;
  • Inflammation;
  • Prostate pain and inflammation;
  • Vascular (circulation) issues;
  • Viral infections.

3.0 Cautions...

  • Very high doses can cause kidney damage;
  • DO not give Quercetin to dog and cats with kidney disease;
  • Do not give to pregnant or lactating dogs and cats.

4.0 Side Effects...

  • ·    In some individuals can cause tingling in the limbs.

5.0 Drug Interactions...

  • Some antibiotics;
  • Cyclosporin;
  • Medications changed by the liver;
  • Medications moved by pumps in cells.

6.0 Administration and Dosage…


  • Quercetin can be administered for up to 12 consecutive weeks at a time;
  • Only use Quercetin for as long as absolutely required – you should not keep your dog or cat on permanently on Quercetin;


  • Dog’s or Cat’s body weight (lbs) x 1000mg;
  • Divide the resulting number by 125;
  • The resulting number will be the mg daily dosage required;
  • Then split the daily dosage in half;
  • Administer the half dosage two times a day with food.

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Important Note

1.0 Use of Foods, Herbs, Alternative Medicines:

Safe use of items and protocols in the article above, is your sole responsibility.

Foods, herbs and alternative medicines have health issue, condition and conventional drug interactions. Safe use of all substances and protocol are your responsibility.

Before you use any substance or protocol do your research. Check for cautions, contradictions, interactions and side effects. Do not use substances or protocols not suitable to your animal's individual circumstances.

If your animal has an underlying condition substances and protocols may conflict.

2.0 Definition of Holistic…

Food, herbs, alternative medicines are NOT ‘holistic’ they are a substance and MAY, or may NOT be ‘NATURAL’.

If you use a ‘natural’ substance (ie. an herb) you are using a natural substance, not a holistic substance.

Holistic is not defined by use of one or several substances. Holistic is an approach.

Definition of “holistic” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press


"relating to the whole of something or to the total system instead of just to its parts"

"Holistic medicine attempts to treat the whole person, including mind and body, not just the injury or disease."

Holistic is a way of approaching life, and within that health, and well-being.

3.0 Expectation a natural substance remedies a health or behavioral situation.

A natural substance used to treat symptoms. But, if factors causing the underlying issue remain you do not have a remedy.

Remedy requires a comprehensive approach. It is necessary to identify root cause. Remove items that trigger, cause or otherwise contribute to issues. Holistic approach includes design, implementation to treat, remedy and maintain long-term health.

4.0 Leave a Comment

I review all comments and publish those deemed appropriate for this site.

I answer questions deemed appropriate when I have time to do so.

Wishing your dog and cat the best of health!

Karen Rosenfeld
Ottawa Valley Dog Whisperer
Holistic Behaviorist - Dogs
Holistic Diet Nutrition Wellness Adviser – Dogs and Cats