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As a responsible pet owner, ensuring the well-being of your furry companion is paramount. Sometimes, dogs may experience allergies or itching, which can be overcome using antihistamines like Piriton (chlorphenamine). However, it’s crucial to administer medications safely and correctly to avoid any potential harm to your pet. This comprehensive guide provides essential information on how much Piriton you can give to your 20kg dog, along with important considerations, my practical experience with this product, and frequently asked questions.

What is Piriton?

Piriton, also known as chlorphenamine, is an antihistamine commonly used to relieve symptoms of allergies, itching, and other allergic reactions in both humans and dogs. It works by blocking the action of histamine, a substance produced by the body during an allergic reaction.

Can you give dogs piriton? What are the benefits and drawbacks of piriton, a human medication, when used in dogs? This is a common question we often hear from dog owners when they visit vets, and it’s a valid concern. Yes, you can give Piriton to both humans and dogs, but in moderate quantities

How much Piriton can I give my 20 kg dog?

For your 20kg dog, figuring out the proper dosage of Piriton is essential to guaranteeing both safety and efficacy. As your veterinarian advises, dogs should generally get 0.2-2 mg per kilogram of body weight every 8–12 hours.

As a general rule, if your dog is under or up to 20 kg, one tablet or 4mg is suitable, while if he is over 20 kg maximum of 3 tablets or 12 mg would be enough for one day’s intake.

If you give one tablet in the morning and your dog starts to scratch again in the evening, one serving idea is to split the tablet into two, feed half in the morning and half in the evening.

When the dog scratching is so bad, give two tablets in the morning and one tablet in the evening.

Note: Every dog is different, and the provided prescription is general, but if symptoms like drowsiness are severe, reduce the dosage and contact your vet to change the medicine.

Can I give more than the prescribed limit of Piriton to 20kg dog?

A dog lying on the floor.

No, giving more than the prescribed limit of Piriton to a 20kg dog or any pet is unsafe. Here are some reasons why you should never give more than the prescribed limit of Piriton to your 20kg dog:

  • Increased Risk of Side Effects: Piriton can cause side effects such as drowsiness, dry mouth, gastrointestinal upset, urinary retention, and cardiovascular effects. Giving more than the prescribed dose increases the likelihood of these side effects and may exacerbate their severity.
  • Potential Toxicity: Overdosing on Piriton can lead to toxicity, especially if the excess amount is significant. More toxicity in dogs leads to kidney and liver damage, affects the respiratory system, and decreases red blood cells.
  • Individual Sensitivity: Dogs may vary in their sensitivity to medications, including Piriton. Depending on age, health status, and underlying medical conditions, what may be a safe dose for one dog could be too much for another.
  • Risk of Drug Interactions: Giving excessive amounts of Piriton can increase the risk of drug interactions, especially if your dog is taking other medications concurrently.
  • Long-Term Health Implications: Chronic overuse of Piriton or repeated instances of overdosing can have long-term health implications for your dog, potentially compromising their overall well-being and requiring ongoing medical management.

What should I do if my 20 kg dog consumes too much Piriton?

Contact a veterinarian right away if you think your 20 kg dog may have overdosed on Piriton or has consumed more than is recommended. For advice, contact your veterinarian or an emergency veterinary clinic. Be ready to discuss any symptoms your dog may be exhibiting and the quantity and time of the drug taken. Supportive therapy may be part of the treatment, including intravenous fluids, gastrointestinal cleaning, and problem monitoring.


Can we give Piriton to puppies?

Yes, Piriton can be given to puppies, but it’s crucial to do so under the guidance of a veterinarian. Puppies may experience allergies or itching like adult dogs, and Piriton can help alleviate these symptoms.

Is Piriton safe for all dog breeds of 20 kg?

Piriton is generally considered safe for all dog breeds when used as directed by a veterinarian. However, it may not be suitable for dogs with certain health conditions or those taking specific medications.

Can I give my 20 kg dog Piriton for motion sickness?

While Piriton is primarily an antihistamine, it may have mild sedative effects that could help alleviate symptoms of motion sickness in some dogs. However, consult your vet for appropriate treatment options.

Can I give my dog Piriton for itching?

Yes, Piriton can relieve itching in dogs caused by allergies or other allergic reactions. However, always consult your vet for proper dosage and administration instructions.

Can dogs eat Piriton? If yes, how much should I give to my 20 kg dog?

Now, remember the simple rule: one tablet or 2.5 ml syrup for dogs up to 20 kg and three tablets or 7.5 ml syrup for dogs over 20 kg.


Responsible pet ownership involves ensuring the well-being of our dogs, especially when they face health challenges like allergies or itching. Piriton (chlorphenamine) can be a valuable tool in managing these issues, but it’s vital to administer it safely and in appropriate doses.

This guide has provided essential information on using Piriton for 20kg dogs, including dosage recommendations, considerations, and guidance on potential risks. Always consult your vet for personalised advice and closely monitor your dog’s response to treatment. By following these guidelines, you can help keep your pet healthy and comfortable.

Safely administer Piriton to your 20kg dog for allergies. Learn dosage, administration, & risks to ensure your pet's well-being.
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