How Much 81mg Aspirin Can I Give a Full-Grown Jack Russell Terrier?

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When your dog is in pain, there are different types of pain relieving medicine that you can administer. One of the most common medications given to dogs in pain, especially Jacks, is Aspirin. In most cases, it usually suffers from arthritis or hip dysplasia which causes joint pain.

You ask yourself, how much 81mg of Aspirin can I give a full-grown Jack Russell terrier?

How Much 81mg Aspirin Can I Give a Full-Grown Jack Russell Terrier?

The amount of 81 mg of Aspirin you should give to a full-grown Jack Russell is 1 for every 10 pounds it weighs. This should be for over 12 hours. If your Jack weighs 20 pounds, you should give it 2 tablets and, ideally, in 24 hours, it should have taken 4 tablets.

Talk to your vet about the type of Aspirin to get for your Jack. Do not make the mistake of giving it human Aspirin, as some are designed to prevent stomach irritations. When given to dogs, the dog cannot digest it and excretes it in the stool.

An image of an Aspirin in a blue background

What You Need To Know About Jack Russells and Aspirin

Before you give your dog any medication, in this case, aspirin, you have to research it. Find out how it can negatively affect your Jack and the benefits your Jack will get.

Benefits of Aspirin to Your Jack Russell

As mentioned, your vet is going to recommend giving Aspirin to your Jack when it is in pain as it is a pain reliever. However, this may not be the first drug they recommend for use. They do it when the other drugs they suggest do not work on your dog, or your dog has an underlying condition and may react with Aspirin.

Other instances you can give your dog Aspirin are:

Aspirin has also been linked to having a good effect on the heart.

Risks of Aspirin

In humans, the side effects are usually few and not serious. However, in dogs, they are many and can be fatal.  Some indicators that the Aspirin is affecting your dog negatively include:

  • Blood in stool
  • Nausea
  • Diarrhea

Some of the more serious consequences of Aspirin to your JRT include:

Reverse Healing

Aspirin relieves pain by inhibiting prostaglandins released when the body is in distress. They create symptoms that are natural to the healing process. When you inhibit them, you prevent them from working correctly and therefore making the condition you are trying to treat even worse.

Liver Damage

If you give your Jack Aspirin regularly, it is likely to cause damage to the liver. Subsequently, it will not be able to detox the toxins in the body, causing further harm. It can also lead to conditions such as acute liver failure and hepatitis.


Prostaglandins protect your dog’s stomach and inner lining; when the Aspirin is inhibiting them, it means they cannot do their job. This causes the stomach to develop ulcers. You may not immediately realize that it has an ulcer and continue giving the Aspirin. This causes the ulcer to perforate or bleed.

An image of Aspirin on a orange plastic bottle

Alternatives to Aspirin

The risks associated with giving your furry friend Aspirin are many. In some cases, such as when your dog suffers from Von Willebrand, you cannot provide Aspirin. Some of the alternatives to Aspirin include:

  • Turmeric
  • CBD oil
  • Devil’s claw
  • Canine acupuncture
  • Dietary supplementation and modification
  • Physical therapy

When selecting an alternative, choose one that treats the cause of the pain. If your dog is in pain because of joints, consider canine acupuncture or physical therapy. The solution has to be matched to the cause.

Related Questions

Other questions you may have are answered below.

Is There a Link Between Aspirin and Cancer?

Yes, there is a link between Aspirin and cancer. The most recent results from a study indicate that it increases the chances of getting cancer. However, studies in the past have also shown that Aspirin reduces the risk of certain cancers.

Is Plain Aspirin Good for My Jack Russell?

Plain Aspirin is not good for your Jack. It is meant for humans and should not be given to dogs. It is uncoated and can cause irritations in the stomach lining of the dog and lead to internal bleeding.


Before you give your dog aspirin, ensure you talk to your vet so they can tell you if it is really necessary or if there is another drug you can give your dog instead. You do not want to cause more harm to your furry friend. You should also avoid giving too much Aspirin to your dog as it can be fatal.