What is the best antihistamine for dogs?
Celine Lind
2025-08-22 19:07:47
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Diphenhydramine, cetirizine, and loratadine are commonly used antihistamines that relieve allergy symptoms or counteract allergic reactions in humans. Antihistamines are usually safe for dogs but can make some dogs drowsy and others hyperactive. OTC antihistamines may contain other ingredients, such as decongestants, that are not safe for dogs. Read the label carefully to ensure that the product only contains antihistamine. Check with your veterinary healthcare team to make sure that the antihistamine you have is suitable for your dog and that you know the appropriate dose to administer.
Caroline Kihn
2025-08-19 11:17:17
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Antihistamines help to control itching in approximately 1/4 to 1/3 of dogs with skin allergies, especially if started when skin itch is still mild and if used with Omega-3 Fatty Acids. They are inexpensive, readily available as over-the-counter medications, and generally free of side effects. In any individual patient, one antihistamine may be significantly more effective than another. Therefore, you may need to try several until one is found that does help, before determining that they are not effective in your dog. Cetirizine (Zyrtec) ¼ – ½ mg per pound (one 10mg tab per 30-40 lbs) twice daily. Loratadine (Claritin): ¼ mg per pound (half of a 10mg tablet per 20 lbs) once daily. Clemastine (Tavist-1, Antihist-1): 0.02mg per pound (one 1.34mg tablet per 65lb dog) twice daily. Diphenhydramine (Benadryl): 1mg per pound (one 25mg tablet for a 25lb dog) twice daily. Hydroxyzine: 1mg per pound (one 25mg tablet for a 25lb dog) twice daily.
Broderick Tremblay
2025-08-07 06:01:51
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According to the American Kennel Club (AKC), you can give the antihistamine Benadryl (diphenhydramine) to your dog, but you should always check with your vet first. Benadryl can be used to treat dogs with: Hives Swelling Cough Sneezing Runny eyes or nose. Other antihistamines can also be given to dogs, based on their weight. These include the below antihistamines: Cetirizine 1 milligram per kilogram of body weight or 10 to 20 milligrams per dog, once or twice per day. Clemastine 0.1 milligrams per kilogram of body weight, two times per day. Chlorpheniramine Dogs under 20 kilograms 4 milligrams, three times per day Dogs over 20 kilograms 8 milligrams, three times per day. The safest dose is different for different antihistamines, so always check with your vet first. AKC says the dose for Benadryl is 2 to 4 milligrams per kilogram of body weight, two to three times per day.
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