How Long Will a Cat Have Diarrhea After Deworming


How Long Will a Cat Have Diarrhea After Deworming

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A cat’s digestive system is delicate and can be disrupted by the wrong food or medicine. When administering a deworming medication, it is important to note that cats will often have diarrhea for anywhere from 3-5 days afterward. This could potentially lead to dehydration, so make sure your pet has access to plenty of fresh water and a clean bowl at all times. 

How Long Will a Cat Have Diarrhea After Deworming

While this might not seem like a big deal, it can actually be life-threatening as many pets do not know how much they need to drink to stay hydrated during an illness like when they are hosting parasites! If you want to know how long will a cat have diarrhea after deworming, then read this full blog post.

What Is Deworming?

The process of deworming your pet involves giving them medication to kill the parasites living inside them. Unfortunately, some pets react badly to certain medicines, so it’s important to follow the instructions on your prescription bottle carefully to ensure their health.

You must consult with a veterinarian about how much water or food should be given to your pet during their recovery period. This way, everything goes smoothly for both you and your pet.

Signs That Tell your Cat Will Have Diarrhea After Deworming 

If you have a cat and you are thinking about administering deworming medication to it, then make sure your little kitty will avoid the following side effects:

1. They Become Lethargic 

Many cats feel better once they expel the worms from their body, so this might be why they look weak after having gone through this process. If they feel weaker than usual or like their energy levels have decreased drastically, check with your veterinarian as soon as possible.  

2. Vomiting 

Vomiting is one of the most common side effects that come along with deworming medications. This means that if your pet has thrown up at all in the last 24 hours, then contact your veterinarian immediately! Vomiting can lead to dehydration, so you must stay on top of the situation.  

Vomiting Can Lead to Dehydration

3. Not eating 

If your cat is refusing their daily meal and behaving as though they are unwell, it may be because they have been dewormed and their digestive system is upset, or they simply do not feel well anymore. Check with your veterinarian for more information.

4. Diarrhea is Present 

This might come as a surprise but taking a deworming medication will actually cause your pet to have diarrhea for a few days after jumping on this treatment plan! The reason for this is when the medicine goes through their body, it kills any worms inside and causes them to come out. This might sound gross, but it is actually a good thing!

5. Loss of Appetite   

This side effect is similar to the side effect mentioned in step three, except that your pet will not want to eat their food at all because maybe they do not feel well or are just feeling lethargic. Again, you should contact your veterinarian for more information about how long will a cat have diarrhea after deworming. 

Cats Feel Better Once They Expel the Worms

6. Vocalizing 

If your cat is constantly meowing or crying, and it doesn’t seem to be coming from inside their throat but rather from outside, they could be in pain. This could also be a sign that the deworming medication is wearing off, so make sure you contact your veterinarian if you hear any strange noises from them at all.

7. Increased Breathing

Some cats may experience an increase in how much air they are taking into their lungs during their recovery period (or vomiting). If your pet seems upset about something, then check with your veterinarian because there might be a reason they are taking quick, shallow breaths. 2. Gums and tongue may look blue

8. Increased Thirst

If you notice that your pet is constantly drinking water or becoming dehydrated, then it might be because of the increased amount of diarrhea and vomiting going on inside their body during the recovery period.


We want to make sure that you and your cat are getting the best information possible about how long will a cat have diarrhea after deworming. Cats with worms often have a more prolonged, intense bout of diarrhea than those without worms.

According to one source we looked at, the affected animal may stop eating because its stomach is too full or has an upset tummy. This can lead cats into a cycle where they don’t eat, which leads them back in line for round 2 of worm-induced diarrhea! Be sure not to leave this untreated and contact us if you need help finding out what’s going on.