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$35.14 $23.93 
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Fiber Capsules 100 ct
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$35.14 $23.93 
Ships in one business day or less

Step 1. Select an Option:

Fiber Capsules 100 ct
Price w/coupon SAVE20
You save $11

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Product Info

What is Vetasyl?

Vetasyl encourages natural elimination without the aid of chemicals, while providing gentle, effective relief from constipation. It also helps to reduce hairballs. Vetasyl contains 100% natural fiber sources and is formulated without preservatives, artificial flavors or colors


Cats and Dogs


  • A natural remedy for digestive issues
  • Helps reduce hairballs
  • Returns normalcy to your pets elimination
  • Convenient, and easy to administer
  • Contains 100% natural fiber sources
  • Formulated without preservatives, artificial flavors or colors
  • No reported side effects

How does Vetasyl work?

Vetasyl is sprinkled over food every day to aid in better digestion. The natural fiber source, which includes psyllium and barley, encourages natural elimination without the aid of chemicals.


For veterinary use only. For best results an ample supply of water should be available. If you suspect that your pet has received an overdose of Vetasyl, consult your veterinarian or emergency veterinary clinic immediately. Keep out of the reach of children.

How to Use

Vetasyl Directions:

  • Vetasyl is 100% natural.
  • Vetasyl is formulated without the use of preservatives, artificial flavors or colors.

Constipation may also be a symptom of another health condition, so you should talk to your veterinarian if your pet experiences chronic constipation.

Dogs and Cats:
Under 8 lbs
½ capsule per day
8-20 lbs
1 capsule per day
Do not use!

Store at room temperature. Keep out of the reach of children.


Vetasyl Ingredients:

Active Ingredients (per capsule)
Psyllium seed husks
Barley malt extract powder (flavor)
Guaranteed Analysis (per capsule)
Crude Fiber
90% (maximum)
Customer Reviews
Vetasyl is rated 4.9 out of 5 by 53.
Rated 5 out of 5 by from Vetasyl Have been using this for my CAT Sugar Foot for awhile. It helps her a lot.
Date published: 2017-09-19
Rated 5 out of 5 by from good product been using this on my dog over one year to boost fiber along with his dog food that has dual fiber in it for his diabetic
Date published: 2017-01-07
Rated 5 out of 5 by from It Really Works I have both of my cats of Vetasyl and they like it. Plus it works and is easy to use. I made sure to check the other reviews for tips. After opening the capsule, I add warm water to the Vetasyl to dissolve it and add the mix to their food. Happy campers here.
Date published: 2016-12-23
Rated 5 out of 5 by from This stuff really works. I have 2 cats that have hairball issues that are virtually gone now and digestion of regular food seems to easier on their bellies. It's definitely worth the money, and it doesn't even cost that much.
Date published: 2016-11-30
Rated 5 out of 5 by from Amazing product I had a scare my cat was not her self for a well after all my research petmeds led me to the perfect cure after reading the reviews I was convinced eventually I had to try it to believe it.and here I'm giving back by saying thankyou to petmeds and everyone taking time to shaire your stories that helped my cat to get better and I hope I can help the next one in need.
Date published: 2016-09-30
Rated 5 out of 5 by from It sure helped my cat My cat was having hairball issues. The vet recommended Vetasyl for her. She only has to have it once a day
Date published: 2015-11-20
Rated 5 out of 5 by from Great results Since Rosie developed a partial intestinal blockage and constipation last year, we tried a number of solutions that helped, but did not meet all the criteria, until we tried Vetasyl. 1. Effective: Rosie's bowel movement are regular and firm enough to scoop but soft enough to easily pass through her system. 2. Easy to administer: just pull the capsule open, sprinkle on canned food, mix and serve. I add a little water to increase her fluid intake. 3. No sugar or petroleum chemicals added: In spite of our efforts to control it, Rosie is overweight, which puts her at risk for diabetes, She gained weight with another product that had added sugar. Also, I was concerned that it might prevent her from absorbing some of the nutrients in her food. Rosie is 17 years old now, and we are happy to find a solution that works and does not compromise her health.
Date published: 2015-06-21
Rated 5 out of 5 by from THE answer for constipation Finally I found the solution to my cat's constipation problem. In the last 4 or 5 years my aging tabby has had serious problems with constipation. She gets impacted all the way up to her diaphragm and it can even block her urethra, making it impossible for her to urinate. I've been using Enulose (Lactulose) for the last few years, augmented by monthly costly trips to the vet for enemas and overnight stays. The vet added Cisapride to her medication schedule, but her stools were so hard, the Cisapride just caused more cramping. In desperation I started researching medications and treatments, and stumbled upon Vetasyl. What did I have to lose? It is the answer. Her stools are now soft enough for her to expel and she is a happy little baby! I'm wondering why my vet didn't know about this... She is a very small kitty, barely 5 pounds, so I have to give her half dosages. I would prefer to buy the powder without the capsule, since I have to take them apart anyway. But it is a small sacrifice to see her little body working properly with no pain!
Date published: 2014-08-18
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hi how long before you can use this med after not going to the litter ,a month ? how far can you go back I my notice the problem about a week what happened if it been hapning longer than that specialy my cat is an in indoor and outdoor,please help .

Asked by: Atlas
Vetasyl is sprinkled over food every day to aid in better digestion. The natural fiber source, which includes psyllium and barley, encourages natural elimination without the aid of chemicals. You do not have to wait for your pet to have a bowel movement; since it is a natural source of fiber you can begin to give it daily and monitor your pets stool to see if it helps. The recommended dose for pets 8 to 20 lbs is 1 capsule a day sprinkled over food. For pets less than 8 lbs, use ½ capsule per day.
Answered by: Christine
Date published: 2017-04-04


I'm giving my cat vetasyl she does like it at all can I put it in a syringe and give it to her?
Asked by: lynn
What I do with the medicine. I put it in a teaspoon of water .The water makes it like a paste then I give it to her. I have to put it in her mouth with my finger. Hope this will help
Answered by: lazykat13
Date published: 2015-11-21

Would it be harmful if I give my cat 2-pills a day?

My cat has developed chronic constipation and I have tried Lactalose from the Vet, which failed miserably. Then I tried Lax-eze that worked for a while, but after a month or so, she got bound up again. I thought it was a miracle when I found Vetasyl, using it once a day and Lax-eze for feedings during the day. After spending loads of money at the Vets, finally a cure! Unfortunately, it was short lived, because after 6-months, she is back to being constipated. I encourage her to drink (broth/water), but I am back to square one again. I am hesitant to give her 2-pills (am/pm), but I really need your help / suggestions!
Asked by: Deb
You might increase her water intake even more without the broth, which may add salt and increased calories. . We add water along with the Vetasyl on her canned food in the morning. We only give her Vetasyl once a day, but we also add water to her canned food for her evening meal. If you only have one water dish, you might add others at convenient spots for her. Some people I know have good results with a fountain device for pets that prefer it to still water In bowls.
Answered by: Rosie's staff
Date published: 2015-06-22

Cat with Diabetes

Is there any contraindication of using this medication for a cat with Diabetes. My cat is 11 yrs old and in on insulin twice per day. Even though she has bowel movements daily, they are hard and difficult for her to pass. Are there carbohydrates in this medication enough to affect her blood sugar?
Asked by: WA Cat Mom
It should be okay to use, but please consult your veterinarian to make sure it is safe for your cat and your cats diabetes.
Answered by: Kelly P
Date published: 2015-01-08

How many Vetasyl are needed for an 87lb Lab?

Asked by: seventeen
give 4 to 5 capsules per day
Answered by: Linda petmeds pharmacist
Date published: 2014-01-25

My cat has loose stools but eat and drinks regularly. Will this help make her stools more solid?

Her behavior is normal. Yesterday I started to ween her on a new indoor cat formula but this has been going on for the past 2-3 days.
Asked by: Leesha
definitely this Vetasyl works well. Check with your vet and see if your cat might also need a dry low fat kibble type of diet like lowfat WD which is what I give to my cat. The Vetasyl works but we also have to have a diet of 7% or lower fat content, preferably dry, mixed with water. Just a suggestion. But seriously check with your vet first before using any of this.
Answered by: Florida Gal
Date published: 2013-11-11

Should I be worried that I didn't open the capsule?

My vet didn't mention in his instructions that I was to open the capsules and sprinkle them on the food -- so I've been doing it for 4 days now (twice a day due to her awful constipation), is this a problem?
Asked by: KrisDC
Yes, you need to open the capsule, sprinkle on the food. And if the pet won't eat it that way, open capsule in a dish, pour a little water, mix well and then mix into the food.
Answered by: Florida Gal
Date published: 2013-11-11

Will vetasyl help my dogs craving for grass?

My 90lb labradoodle is looking to eat grass it helps his stomach to digest. I think he needs somethig in his diet maybe this would help.
Asked by: rocky
You might be better off using a probiotic such as NaturVet Enzymes and Probiotics. This should help to settle the pet's stomach better than Vetasyl. Vetasyl is usually used to treat constipation. As long as your pet is doing it's thing, the probiotic is, in my opinion, the better choice.
Answered by: Gary, Dir. of Pharmacy Services
Date published: 2013-10-22
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