• Zentonil Plus for Small to Medium Dogs 200mg (30 tablets)

    Zentonil Plus for Small to Medium Dogs 200mg (30 tablets)

    SKU: 423455
    Regular Price: $49.99Sale Price: $41.70
    One Time Order

    Autoship & Save!    [MORE DETAILS]

    If you like, we can email you the moment we receive a new shipment.




    You will be notified when the product is back in stock.
    Thank you for your patience.

    Sincerely, Everyone at EntirelyPets!

    Keep Shopping


    This item is currently out of stock and should be shipped 4-6 weeks. We recommend trying Denestra® 200 mg (60 Tablets)

    ZENTONIL is a nutritional supplement intended for dogs and cats with liver diseases.

    ZENTONIL is a nutritional supplement that provides an effective therapeutic agent for liver support in dogs and cats. The ingredient, S-adenosylmethionine (SAMe), is a naturally occurring compound that is found in almost every tissue and fluid in the body. ZENTONIL can be used in all cases where the liver requires some support such as...

  • acute or chronic liver damage
  • mild liver disease
  • regular treatment of liver damaging drugs (Phenobarbital, NSAIDs, glucocorticoids, etc.)

  • SAMe is used by the liver in many biochemical pathways. It has been shown to strengthen the cell membranes; thus, improving liver cell function and providing the building blocks for antioxidants used by the liver.

    ZENTONIL Facts:

  • Nutritional supplement
  • Natural chemical produced from the amino acid called methionine
  • Protects and supports healthy liver functiont
  • Improves antioxidant levels that protect cells from toxins
  • Protects and repairs liver cells
  • Easy-to-administer, palatable tablets that can be split
  • Available in different sized, scored tablets 100 mg, 200 mg and 400 mg
  • Top

    Usage Information

  • Use as directed by your veterinarian
  • Follow the instructions on the label
  • ZENTONIL at room temperature and away from light and moisture
  • Be sure to continue the medication to insure a full recovery, even if your pet seems to be improving or unless you consult with your veterinarian
  • Duration of administration depends on the condition being treated and the response to the medication and development of any adverse effects
  • Allow your pet access to plenty of water
  • ZENTONIL should be administered on an empty stomiach - 1 hour before or 2 hours after meal

  • Dosage for Dogs and Cats
    Body Weight (lbs) ZENTONIL 100 ZENTONIL 200 ZENTONIL 400
    Less than 5 lbs 1/2 tablet - -
    5 - 11 lbs 1 tablet 1/2 tablet -
    11 - 22 lbs 2 tablets 1 tablet 1/2 tablet
    22 - 33 lbs - 1.5 tablets 1 tablet
    33 - 44 lbs - 2 tablets 1 tablet
    44 - 66 lbs - - 1.5 tablets
    66 - 110 lbs - - 2 tablets
    Over 110 lbs - - 3 tablets

    Dosage FAQ's
  • Im the case of a missed dose of ZENTONIL, give it as soon as you remember or just wait until it is time to give the next one. DO NOT GIVE A DOUBLE DOSE OF ZENTONIL.
  • In the case of an overdose of ZENTONIL, seek attention from your veterinarian.

  • ZENTONIL Warnigs:
  • Do not give ZENTONIL to any animal that has had an allergic reaction to SAMe
  • Blood tests are necessary to monitor liver values

  • Possible Side Effects With Zentonil:
  • Nausea
  • Behavioral Changes

  • This supplement is usually well tolerated. If you notice anything unusual, contact your veterinarian.


    Methionine as S-Adenosylmethionine: 200mg per tablet, lactose, magnesium oxide

    Guaranteed analysis:
    Crude protein (Min.) 29.00%
    Crude Fibre (Max.) 22.00%
    Crude ash (Max.) 6.10%
    Moisture (Max.) 5.61%
    Crude fat (Min.) 1.80%
    Sodium (Min.) 0.84%
    Copper (Min.) 3 mg/kg

    Keep in a cool and dry place.
    Store in the original pack.
    Keep the container tightly closed.
    Keep out of reach of children

    Customer Reviews

    DISCLAIMER: The results described on the testimonials on this site, are the individual experiences and personal opinions of those who have purchased and used the products. These testimonials are not intended to make any claims that the products can be used to diagnose, treat, mitigate, cure or prevent any disease or medical condition.
    Click here to see all reviews
    Good Price & Service by Do not have one03/14/2013

    Saving about $10 per bottle including shipping.

    Just what the doctor ordered... by DocVicki from Okla.08/11/2013

    My vet prescribed this for my 9 yr old Jack Russell terrier who's been suffering from possible liver cancer. It has really increased his quality of life. I found it at entirelypets.com for just about half. Since I will have to give this to my JR for the rest of his life, saving that much really helps.

    great suplement by Diane08/23/2013

    I am happy with the results! Midnight has spent a life time on drugs (very bad for her liver) but apparently they helped with her seizures. I've reduced those drugs dramatically and added this product. It seems to provide more energy, awareness and enthusiam! Her seizures have not dramatically increased although I have reduced her meds by 2/3 with very little repercussion to our sweet girl!

    Captain by Christy05/21/2013

    Dr. Prescribed this medication saying it was a life time medication needed for my Boston terrier. Bought it the first time from her and knew I had to find the medicine at a more affordable price. That's when I found Entirely Pets. I have been buying it for over a year now the price has remained the same. I send my order in and it is at my front door within 2 days. Wonderful service.

    by phil from florida02/07/2014

    the zentinol seems to be working fine with my dog. i also have been buying the joint max triple strength. had gotten 3 orders so far and he is walking much better, the purchase prices with entirely pets cant be beat. And there customer care service is always very helpful. thank you entirely pets

    works great by brandys mom from Spring, Texas08/11/2014

    I bought the Zentonil Plus through Amazon and Entirely Pets. The medicine works great., it arrived quickly and was cheaper than going through the Vet's office directly.

    Great price and delivery time by Larosenancya from Whitby, on, canada07/26/2013

    This stuff helps my 18 year old dog with liver disease. It helps him digest food.

    Good by gainmon from Vancouver, Canada09/10/2014

    I received exactly what I ordered. Just too bad shipping to Canada is not free on orders over $90. With the dollar exchange and shipping, it added up quite a lot. But the product is exactly the same as from my Vet.

    by from 06/20/2014

    I was purchasing Zentonil Plus from our vet at more than double the price. I am so glad I found this.

    Staunton, Virginia by from Thanks"




    Great service by Nat3074 from Vancouver B.C.01/07/2013

    Thanks for the prompt shipping and great prices. I will be a repeat customer!


    Questions and Answers

    See more from
    Zentonil Plus for Small Dogs & Cats 100mg (30 tablets)Zentonil Plus for Small Dogs & Cats 100mg (30 tablets)
    Reg price: $39.99
    Sale price: $33.56
    Zentonil Plus for Medium and Large Dogs 400mg (30 tablets)Zentonil Plus for Medium and Large Dogs 400mg (30 tablets)
    Reg price: $89.99
    Sale price: $73.98

    Security Seals
    EntirelyPets.com, Pet Supplies & Foods  Retail, Union City, CA


    ~ My Account Login ~

    Sign into your EntirelyPets Account for the best experience!