Antihistamines are usually safe but can make some dogs drowsy and others hyperactive. OTC antihistamine preparations 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.
Antihistamines with the active ingredients of diphenhydramine, chlorpheniramine, cetirizine, clemastine or loratadine are usually safe for most healthy adult dogs. Hydroxyzine is another dog-safe antihistamine and one of the most effective available, but it's only available on prescription.
The most commonly used antihistamines for dogs include: Diphenhydramine (Benadryl®) Loratadine (Claritin®) Cetirizine (Zyrtec® or Reactine®)
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.
The dose is 1 mg/kg twice daily. fexofenadine (Telfast®) – this is a second gen. It is available as 60 mg capsules and 120 or 180 mg tablets. The dose is 5–10 mg/kg once or twice daily (don't use if your dog is on ketoconazole or a macrolide antibiotic)
Telfast®- (active ingredient fexofenadine ) these are available in 60 to 180 mg tabs. But note that while not likely to overdose, the dosage for most dogs is only 5-10 mg / Kg once or twice a day.
Zyrtec is one of the safer medications you can give to your dog, so as long as you do so correctly and under your vet's guidance, your pet should be good to go. Zyrtec is also a difficult medication for a dog to overdose on. They have an extremely high tolerance for it, so long as they aren't allergic to it.
Telfast 180mg is suitable for most hayfever allergy symptoms. Its 5-in-1 multi-benefit relief helps ease symptoms such as sneezing, itchy and runny nose and itchy throat. It is also suitable for those suffering from itchy skin rash or hives (urticaria) associated with allergies.
The most common antihistamine for dogs is diphenhydramine (brand name Benadryl). Also found in ProSense Dog Itch & Allergy Solutions Tablets, diphenhydramine is safe in most dogs if given in the recommended dosage of 1 mg of diphenhydramine per pound of body weight given by mouth.
Quercetin is a bioflavonoid that provides natural allergy relief for dogs reducing symptoms like itching, scratching, licking and chewing. Many veterinarians suggest quercetin because it is a safe, natural antihistamine for dogs. In fact, quercetin is often referred to as "Nature's Benadryl".
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.
You can safely give Zyrtec to your dog up to 20 mg per day.
According to the Merck Veterinary Manual, the safe dosage is 2-4 milligrams of medication per kilogram of weight, or 0.9 to 1.8 milligrams per pound. This amount can be administered two to three times daily, depending on your dog's symptoms.
Here's the recommended Zyrtec dosage for dogs based on their weight: Less than 10 pounds: 2.5 milligrams (half of a 5-milligram pill or a quarter of a 10-milligram pill) 10–50 pounds: One 10-milligram tablet. 50+ pounds: Up to two 10-milligram tablets.
ANTI-histamines, such as diphenhydramine (Benadryl®), cetirizine (Zyrtec®), and hydroxyzine, are commonly taken by humans to treat allergy symptoms and can be used for dogs as well.
Official answer. In general, an oral antihistamine tablet will start to work within 30 minutes and reach its maximum effect in about 2 hours. You will know when an antihistamine starts to work when it starts to relieve allergy symptoms, such as congestion, runny nose, itchy eyes or skin rash.
Telfast 180mg is also used to relieve the symptoms of urticaria otherwise known as hives or itchy rash. It works by blocking the action of histamine which causes these unwanted effects. Telfast is a non-sedating antihistamine which means it does not make you drowsy or slow down your reactions.
The most common antibiotic used in skin cases such as this is a cephalexin-based tablet. To help relieve the itching your veterinarian may recommend anti-inflammatories, antihistamines, fatty acid supplements such as MEGADERM® as well as soothing veterinary shampoos such as EPISOOTHE® SIS SHAMPOO.
Diphenhydramine (brand name: Benadryl®, Vetadryl®, Banophen®, Genahist®, Diphenhist®, Unisom®, Sominex ®) is an antihistamine used in cats, dogs, ferrets and other small mammals, birds, horses, and cattle to treat allergic reactions, motion sickness, and vomiting.
AtopiCream is a topical skin treatment for dogs and cats. It features diphenhydramine, an antihistamine, to help soothe the skin and relieve itching and irritation. AtopiCream also contains ceramides, vitamin E, and fatty acids.
Pet allergy relief
ZYRTEC® starts working at hour 1 and stays strong day after day, so you can reduce your cat and dog allergy symptoms.
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 antihistamines.