Overview of Piriton for Dogs

Piriton, containing chlorpheniramine maleate (also known as chlorphenamine), is an over-the-counter antihistamine used to relieve allergy symptoms in both humans and dogs. It should only be administered under veterinary supervision. The dosage depends on the dog's weight and condition. While generally safe, it can cause side effects like drowsiness and should be used cautiously in dogs with certain health conditions or those on other medications.

This is a human medicine that may be prescribed by a veterinary professional under the prescribing cascade. Human-licensed medications can be prescribed under step (c)(i) (in Great Britain) or (b)(i) (in Northern Ireland) of the prescribing cascade. However, this must include a justification as to why an authorised veterinary medicine (for that species and condition, or another species or condition) cannot be used.

In exceptional emergency circumstances, a veterinarian may assess the need to relieve your pet’s discomfort before a clinic visit or home assessment can occur. In such cases, the vet might suggest the use of a human medicine you already have, like antihistamine tablets. However, this does not imply that pet parents should seek human medicine for their pets from a pharmacy independently. It is critical to always consult a veterinary professional first. For further guidance, you can refer to the Royal College of Veterinary Surgeons (RCVS) page on advising clients about over-the-counter human medicines.

Understanding Chlorpheniramine Maleate (Piriton)

Histamine, released in response to inflammation or allergy, causes symptoms like swelling, itchiness, and breathing difficulties by binding to H1 receptors. Chlorpheniramine blocks these effects by inhibiting histamine action on H1 receptors. It is often used for mild allergic reactions, insect bites, and environmental allergies.

What hayfever tablets are safe for dogs?

Several antihistamine medications, such as chlorphenamine (Piriton), cetirizine (Zyrtec), and loratadine (Clarityn), are used to manage hay fever symptoms in dogs. These medications can help alleviate itching, sneezing, and other allergic reactions. However, you must always consult with your veterinarian to determine the most appropriate medication and dosage for your dog's specific needs.

Reference: Day, M. J. (2016). Allergies in the canine patient. Journal of Small Animal Practice, 57(2), 115-125.

Precautions and Side Effects of Piriton

While generally safe, Piriton may cause sedation, lethargy, or gastrointestinal issues. It should be avoided in animals with specific health conditions and used cautiously in pregnant or lactating dogs. Drug interactions should be carefully considered, and skin antigen testing results may be affected.

Reference: Miller, W. H. (2013). Small Animal Dermatology. Elsevier.

Natural Skin Barrier Repair

If itching is localized to the skin, topical solutions like FurBabies Botanicals DermaProtect or DermaRenew Repair Serum can help ease itching. These serums contain plant-based ingredients known to support the skin barrier and reduce irritation. Dietary adjustments, such as adding omega-3 fatty acids or salmon oil, can also help reduce histamine and cytokine-related inflammation in the body.

Reference: Olivry, T., & Mueller, R. S. (2017). Mechanisms of allergic skin disease in dogs. Veterinary Dermatology, 28(3), 240-249.

What antihistamine is best for itching in dogs?

The effectiveness of antihistamines for itching in dogs depends on the individual animal and the underlying cause of the itching. Chlorphenamine (Piriton) is commonly used, but loratadine (Clarityn) may be a better option for dogs that experience significant drowsiness with first-generation antihistamines. Always consult your vet to determine the best option for your dog's specific needs.

Reference: Scott, D. W., Miller, W. H., & Griffin, C. E. (2010). Muller and Kirk's Small Animal Dermatology. Elsevier.

Are human antihistamines safe for dogs?

Some human antihistamines, like chlorphenamine (Piriton), cetirizine (Zyrtec), and loratadine (Clarityn), can be safe and effective for dogs when used under veterinary supervision. However, it is essential to consult with your veterinarian first. Some antihistamines may contain additional ingredients that can be harmful to dogs. Avoid giving human medications to pets without vet guidance.

Reference: Saridomichelakis, M. N., & Olivry, T. (2016). An update on the treatment of canine atopic dermatitis. Veterinary Dermatology, 27(5), 377-e94.

How many mg is a Piriton tablet?

Piriton tablets are typically available in 4mg strength. Other strengths may be available depending on the formulation and brand. It is essential to follow your veterinarian’s instructions regarding the appropriate dosage for your dog.

Dosage Calculation for Dogs

The typical dosage of Piriton (chlorphenamine) for dogs is 0.2 to 0.4 mg per kg every 8 to 12 hours. This dosage must be confirmed with your veterinarian.

Reference: Plumb, D. C. (2018). Plumb's Veterinary Drug Handbook (9th ed.). PharmaVet.

Can Piriton stop itching?

Piriton can alleviate itching by blocking histamine, but its effectiveness depends on the underlying cause. In cases of chronic skin issues, incorporating topical treatments like FurBabies DermaProtect and DermaRenew Serums can provide additional relief.

Reference: Nuttall, T., et al. (2019). Topical therapy in canine allergic dermatitis. Veterinary Dermatology, 30(5), 381-e115.

Important Legal Reminder (VMD):
As per the Veterinary Medicines Directorate (VMD), it is illegal for pet parents to administer human medications like antihistamines to their pets without veterinary supervision. Always consult with a vet to ensure the safety and appropriateness of any medication for your pet.

Disclaimer: Always consult your veterinarian before giving your pet any medication. This guide is for informational purposes only and does not substitute professional veterinary advice.

Below is a leaflet by BSAVA (British Small Animal Veterinary Association) on Antihistamines: