Benadryl is a great medication for use in dogs with mild-to-moderate allergies. Seasonal allergies, food allergies, environmental allergies, and allergic reactions to snake and insect bites all respond to Benadryl in most cases.
Benadryl Tablets
According to the Merck Veterinary Manual, the standard dose for Benadryl is 2-4 milligrams per kilogram of body weight, or 0.9-1.8 milligrams (mg) of Benadryl per pound. Therefore, a simple and practical dose is 1 mg of Benadryl per pound of your dog's weight, given 2-3 times a day.
Just like any medication, Benadryl comes with potential side effects. Common side effects of Benadryl include constipation, sedation, urinary retention, diarrhea, vomiting, increased heart rate, and loss of appetite for some dogs. Always be sure to monitor your dog closely when giving medication for the first time.
You may also notice that Benadryl does, in fact, make your dog sleepy. The majority of side effects occur within the first hour of administration, so monitor your dog's reaction carefully during this time frame. In the event that his reactions are severe, contact your dog's veterinarian immediately.
Benadryl Dose for Dogs
Plumb's Veterinary Drug Handbook recommends giving a standard dosage of 25 milligrams for a 25-pound dog two to three times per day. As a general rule of thumb, use 1 milligram per pound of your dog's body weight. For example, a 50-pound dog would be given two 25 milligram tablets.
Size, breed, and age are factors that can potentially change the standard dosage. However, the recommended benadryl dosage for dogs is around 1mg of Benadryl per pound of body weight, two to three times a day, or until symptoms ease. So, for example, you would give a 25-pound dog 25 mg of Benadryl.
Antihistamines, like Benadryl®, have historically been an easy over-the-counter option to provide people (and pets) some relief. Yet, studies have demonstrated that while antihistamines may relieve respiratory allergies in humans, they had little or no effect on skin allergies in dogs[1,3].
Benadryl is an allergy drug, so obviously, it makes sense to give it to your dog if they're struggling with allergies. Benadryl can help relieve your dog of mild-to-moderate allergy symptoms, including: Itching. Sneezing.
It's true that Benadryl may alleviate symptoms for some dogs, but the sedative effects are mild and not nearly as pronounced in dogs as they are in people. So overall, Benadryl is not commonly helpful for dogs struggling with anxiety or phobias.
Official answer. The general dose of Benadryl (diphenhydramine) is 2 to 4 mg/kg up to three times day. If your dog weighs 25 lbs (11.3 kg) the dose of Benadryl would be 22.6mg to 45.2mg up to three times a day. Benadryl tablets are available in 25mg and 50mg strength.
This medication will take effect quickly, in about 1 to 2 hours, and improvement in clinical signs should follow.
Other safe antihistamines for dogs include Claritin (loratadine) and Zyrtec (cetirizine). They produce less sedation than Benadryl does but could still make your dog drowsy. Warning: Make sure your OTC allergy medicine only contains antihistamine.
Fexofenadine, commonly known as Allegra® or Telfast®, is a second generation antihistamine drug that may be used for dogs and cats to control itching and other signs related to allergic conditions.
Much like Benadryl, the drug Claritin is used most commonly for dogs suffering from allergies. However, unlike Benadryl with the active ingredient diphenhydramine, Claritin's active ingredient loratadine does not induce fatigue. Because of this trait, it is often a popular choice in the treatment of allergies.
The same clinical functions Benadryl has in humans is also active in dogs. Keeping pet safety and your vets advice in mind, Benadryl for dogs can work to treat seasonal allergies, food allergies, or skin allergies.
Cetirizine (brand name Zyrtec®, Reactine®) is an antihistamine used to treat pruritus (itching) associated with atopic dermatitis, urticaria (hives), and insect-bite reactions in cats and dogs. Its use is in cats and dogs is 'off label' or 'extra label'.
Dogs Keep Itching Due to Bacterial and Fungal Skin Infections. Dogs who keep itching but don't have fleas or mites are more likely to have a skin infection. These infections may be bacterial or might be fungal. Yeast infections may also be a culprit for some itching in dogs.
The most common dose given to a 60-pound dog is 1 mg per pound. Because it commonly comes in 25 and 50 mg sizes, a dose of 50 mg would be a good starting point.
Dr. Selmer: In dogs, the effects of Benadryl usually last 8 – 12 hours.
Pruritus in dogs is the sensation in the skin that causes them to scratch. It is a symptom caused by dry skin, allergies, parasites, or other underlying conditions. Anxiety and boredom can cause dogs to lick, chew, and bite as a response. Changing your dog's diet may be the key to stopping obsessive licking behavior.
The most common deficiencies are to zinc, vitamin A and polyunsaturated acids. Adverse reactions may be due to toxins within the diet or due to immunological or allergic reactions to the food. Diet plays a major role in the maintenance of a healthy coat and skin in dogs and cats.