Home Health and Care Safety, Emergencies and First Aid Benadryl Dosage for Labradors

Benadryl Dosage for Labradors


Does your Lab have an allergy? You may consider giving him Benadryl to contain formation of histamine in his body. But, are you aware of the right Benadryl dosage for Labradors? Also, do you know if it may cause side effects in your pet? Find out the right dosage as well as how to avoid side effects of this allergy medication.

Benadryl dosage for Labradors to treat allergy

Dogs may suffer from allergies from time to time and knowing the right Benadryl dosage for Labradors is an important responsibility of a dog owner.

What is Benadryl?

Benadryl, also known by its generic name Diphenhydramine, is the most common allergy medication given to dogs suffering from allergic reactions. An antihistamine, the medication is also one of the most widely used drugs to treat allergies in humans when there is an emergency.

When there is an allergy, the body produces histamines to respond. Benadryl dosage for Labradors blocks the receptors in the canine body from receiving histamine. This helps suppress allergy symptoms, including itching, sneezing, and hives, in your pet.

Apart from treating allergy, Benadryl dosage for Labradors helps prevent disorders associated with motion sickness and travel anxiety. Due to its wider use by both vets and owners, the medication is available in different forms, such as injections, pills, syrup, lotions, sprays, gels, and creams. However, the topical formulation of the medication is safer than injections or oral forms due to fewer side effects.

Uses of Benadryl dosage for Labradors

Benadryl has many important uses in dogs. Benadryl dosage for Labradors helps stem health problems associated with the following disorders.

  • Severe symptoms of allergic reaction
  • Skin itching and hives
  • Travel anxiety
  • Anaphylactic reaction
  • Allergy following vaccination
  • Severe anxiety due to noise or separation from the owner
  • Sneezing, coughing
  • Motion sickness
  • Insect or snake bite
  • Swelling and inflammation or redness
  • Runny nose and eyes

Benadryl dosage for Labradors is also used to help dogs who have mast cell tumors. The medication does not directly treat or eliminate these tumors, but it can help reduce the negative effects of having too much histamine in the body. Diphenhydramine can also help control the dog’s appetite and blood pressure.

Benadryl Dosage for Labradors

The most common dosage of Benadryl in dogs is 1 mg per every 1 lb and is given every eight to twelve hours. For emergency cases, such as snakebites, the dosage can be doubled up to 2 mg per lb.

Do note that Benadryl also comes with another antihistamine ingredient, Cetirizine, which is also commonly available. In case the Benadryl you got has Cetirizine as its active ingredient, the dosage for your dog must be different from what is mentioned above. You may consult your vet to find out the right amount of such medication.

If you wish to know the right Benadryl for Labradors, you must determine your dog’s weight first. After confirming his weight, you may refer to the chart below.

Your dog’s weight Maximum Benadryl Dosage
5 pounds 5 mg
10 pounds 10 mg
15 pounds 15 mg
20 pounds 20 mg
30 pounds 30 mg
40 pounds 40 mg
50 pounds 50 mg
75 pounds 75 mg
100 pounds 100 mg
125 pounds 125 mg
150 pounds 150 mg
175 pounds 175 mg

Side Effects of Benadryl in Dogs

Benadryl dosage for Labradors is generally considered safe when given with care and in the right amount. The medication is very effective because the antihistamine has the ability to cross the blood-brain barrier and act quickly. However, this mechanism enhances the Benadryl’s ability to cause side effects. Again, the medication is not approved by the FDA for veterinary use.

Some dogs that had been given Benadryl or Diphenhydramine may experience one or more of the following side effects.

  • Sluggish movements
  • Sleepiness
  • Increased heart rate, rapid breathing
  • Appearing a little spaced out
  • Dry mouth
  • Urinary retention

Rare side effects following Benadryl dosage for Labradors may include diarrhea and vomiting. Adverse reactions are more likely within the first hour of using the medication.

Precautions before giving your Labrador Benadryl

For dogs suffering from high blood pressure, glaucoma, or heart diseases, it is best to avoid using the medication without consulting your vet. Benadryl may be an over the counter medicine, but it is always best to call and consult a veterinarian before giving your Labrador the medication. Benadryl overdose may cause seizures and agitation in your dog and needs immediate intervention by a vet.


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