Can I Give My Dog Miralax for Constipation? + How Much is Safe


Sometimes you might notice that your dog is experiencing discomfort. It might be lying down a lot and not have its usual enthusiasm for morning walks. If you can see your dog straining or shaking, then this could be the sign that it is experiencing constipation.

No dog owner wants to watch their dog in pain, so you might be tempted to administer some constipation medication to ensure that it can make a very solid bowel movement.

One of the first things you might think about is Miralax. This medication comes in the form of a tasty liquid or powder that is usually administered to humans, but what about dogs?

Well, having combed the internet, we’ve discovered that Miralax is an option for alleviating your dog’s painful digestive issues. However, you’ll probably still want to be aware of how much of this medication that you should give to your dog and whether it will be safe to ingest large quantities.

How much Miralax should you give to your dog? What does Miralax do once it is in your dog’s system? Is it okay to give your dog a large quantity of this stuff? Is it better to give your dog liquid Miralax or a powdered version?

Well, keep reading this article and we’ll give you everything that you need to know about alleviating your dog’s poor bowel movements. We’ll also give you a handy guide to how to administer your Miralax as well as what you’ll need to do if your dog reacts to the medication in a negative way.

Is It Okay To Feed Your Dog Miralax?

First, let’s start off with the million-dollar question: is it okay to feed your dog Miralax? You can indeed give your dog a constipation medication, although you must consult with your veterinarian first.

Like humans, no two dogs are alike, so you should try your best to make sure that you have ruled out any extreme reactions to medication such as this. If your dog does have an adverse reaction, you could see yourself racking up plenty of veterinarian bills to stop them from getting worse.

You should always seek expert advice before doling out medication like this to your canine pal, especially that which has been specifically designed for human beings.

This medication should not be regarded as a long-term solution to the problem of your dog’s diet. This is why you should look to your veterinarian for help, as they can prescribe a course of medication that will only last a certain period until your dog’s constipation has subsided.

What Is The Right Amount Of Miralax For A Dog?

You should be very measured when giving Miralax to a dog, simply because if your dog does have an allergic reaction to this medication, then the more that it ingests, then the more that it will react to the medication. A massive dose of Miralax to an allergic dog could cause a fatal reaction, so be careful.

This is a conservative guideline that you should follow for making sure that your dog does not get hurt from this medication:

  • Small dogs – a quarter of a teaspoon of Miralax every 12 hours (roughly twice a day)
  • Medium dogs – Half a teaspoon of Miralax every 12 hours (twice a day)
  • Large dogs – Three-quarters of a teaspoon every 12 hours (twice a day)

However, before you even follow these measurements, you’ll have to determine what constitutes a small, medium or large dog. This will be judged by the weight of the dog itself.

Veterinarians have recommended that you give your dog 1 teaspoon for every 50 pounds that the dog weighs, which works out at around one-fifth for every 10 pounds, which tallies with the scale that we have written above.

So, bearing this in mind, if you have a dog that weighs around 70 pounds, then you should feed him around 1.5 teaspoons of Miralax every 24 hours, whereas a 50-pound dog will only require 1 teaspoon etc, etc.

We would again stress that this is a very conservative amount for your dog, and you should even check with your vet before doling out the medication. If they see these measurements and approve, then you can go ahead and give your dog the correct amount.

You’ll need to make sure that your dog is properly hydrated throughout the entirety of this process, as this is a natural method of keeping their stools loose. Dog’s will also lose a lot of water through constipation and diarrhea, so you’ll need to make sure they are not overly thirsty.

Dog Hold its Poop

Which Is Better: Miralax Powder Or Liquid?

Veterinarians suggest that the best way to administer a dog’s Miralax is in its food, as the likelihood is that it won’t just lick the Miralax off the spoon.

You’ll need to mix it in well with the food so that the dog cannot detect it, as it might be naturally suspicious of any attempts to sneak something extra into its diet.

A Step By Step Guide To What Happens When You Give Your Dog Miralax?

How Miralax works is quite ingenious, basically what happens is that the solution stimulates the nerves in the dog’s colon, causing them to loosen and propel the stool out of the dog’s backside using the natural methods. It will increase the water content in the dog’s stool, which makes it much easier to pass.

If you administer Miralax to your dog, you should notice a difference within 24 hours of administration. If you notice that your dog is still not passing a stool even after this length of time, then you might be dealing with a more serious issue and will have to consult your veterinarian.

If your dog is taking medication for any other ailment, then we would not recommend that you give it Miralax. This could interrupt the effectiveness of the original medication or the Miralax itself. The Miraxlax might not be absorbed properly into the body of your dog and you might see no alleviation of the dog’s original symptoms.

If your dog is on other medications, then we would recommend that you administer the drug 2 hours after the original medication has been given, as this will give it time to absorb into your pet’s system and will not affect it.

Is It Wise To Give Your Dog Miralax?

Giving your dog Miralax is perfectly okay, as long as you have ruled out the possibility of any damaging side effects and the likelihood of any major allergic reaction.

However, we would recommend that you don’t give your dog anything that is aimed at human consumption. This is because there are enough biological differences between dog and man to render your dog particularly ill.

Some users have given their dog Miralax and have experienced certain concerns that make you think twice before giving your dog this particular substance.

Pet owners have experienced dehydration issues from giving their pet Miralax, saying that it exacerbates the symptoms of constipation rather than alleviates them. Some owners have even stated that their dog has suffered from seizures when they have been given a dose of Miralax.

There was one pet owner who reported with dismay that after giving their dog just one dose of Miralax, that they have suffered from an acute attack of pancreatitis. This is something you’ll want to avoid, as it can be very dangerous for you and your dog.

Adding up a lot of these issues might already be enough to make the average dog owner decide not to give their dog Miralax. Instead, we would recommend that you go to your veterinarian and ask for a laxative that is specially designed for dogs. This way you can rule out any adverse effects.

Side Effects Of Feeding Miralax To Your Dog

There are a few possible side effects to giving your dog Miralax, and during our research, we have uncovered 3 that pop up time and time again in witness testimonies.

  1. Vomiting – a dog might often vomit after it has experienced a dose of Miralax. This is simply because it contains polyethylene glycol, which some dogs have a very bad reaction to, causing them to vomit multiple times.
  2. Diarrhea – another symptom of taking polyethylene glycol is the fact that the dosage of your Miralax is too large for your dog’s weight. Always remember to give the dog the correct dose for its size, checking with the measurements we have listed above.
  3. Pancreatitis – if you give your dog too much Miralax, then you can be sure that it will suffer from an increased pancreatic movement which could, in turn, lead to pancreatitis. This can be a potentially life-threatening condition, so if your dog does start to display signs, we would recommend that you take it to see a vet immediately.

What Else Can You Give Your Dog Besides Miralax?

Luckily for you and your pooch, there are plenty of alternatives that you can give to your dog to encourage bowel movements.

When it comes to dogs, or humans for that matter, any minor ailments such as constipation we would recommend treating with natural methods. The stomach can be a very sensitive area and will react poorly to chemicals.

Here are a few natural and medicinal alternatives to Miralax that you might want to try first:

  1. Hydration – giving your dog plenty of water will automatically promote the movement of stools in your dog’s bowel. Increasing the levels of water in your dog’s bowel will make it much easier to pass through its anus.
  2. High fiber intake – increasing the amount of fiber that your dog has in its diet will be a great method to increase healthy bowel movements. This makes it easier for your dog to digest food and pass it out as waste. You can find plenty of natural, high-fiber dog foods on the market.
  3. Oil – adding omega 3 or cod liver oil to your dog’s diet will be another great method of introducing liquid into its bowel and encouraging the passing of a healthy stool. Vegetable and olive oil are also great for lubricating the stool and allowing them to pass through your dog.
  4. Pumpkin – this vegetable is one of the best natural remedies for your dog, containing a lot of fiber and water that will encourage your body to pass a healthy stool. The best way to feed it is by mixing it into a puree so that your dog can eat it without chewing.

Kerry White

Kerry White is an avid dog lover and writer, knowing all there is to know about our furry friends. Kerry has been writing for PetDT for three years now, wanting to use her knowledge for good and share everything she can with new dog owners. Kerry has two dogs herself - a German shepherd called Banjo and a chocolate labrador called Buttons. Kerry knows more than anyone how adjusting to new life with a puppy can turn your life upside down, and she wants to ease some of the burdens through her articles.

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