Rx Vitamins MegaFlex Powder Joint Supplement for Cats & Dogs, 600-g jar

  • List Price:


  • Price:

    $48.91 FREE 1-3 dayShipping over $49

  • You Save:

    $11.09 (18%)

Autoship: &Save

$46.46(Save an extra 5%)

Simply select Autoship at checkout for easy regular deliveries.

Why Autoship?
  • Save 5% on all future Autoship orders.
  • Choose your own delivery schedule.
  • No fees, no commitments - cancel Autoship anytime.
In stock
cw-icon-heart Created with Sketch. Add to Favorites

Sometimes our furry family members need an extra boost to their nutrition to help them feel their best. Rx Vitamins Mega-Flex Powder Dog & Cat Supplement is formulated by a veterinarian with methylsulfonylmethane (MSM) and sea cucumber to support healthy joints, flexibility and connective tissue. It also contains glucosamine sulfate which is a precursor of synovial fluid and helps rebuild cartilage and improve joint function. Every bottle comes with 600-grams of powdered supplement that’s paw-fectly suitable for canine companions and feline friends alike.

Key Benefits
  • Features joint-supporting ingredients like MSM and sea cucumber.
  • Incorporates glucosamine sulfate which helps build healthy cartilage.
  • Suitable for both cats and dogs.
  • Formulated by a veterinarian.
  • Carries the National Animal Supplement Council Seal (NASC).

Safe use in pregnant animals or animals intended for breeding has not been proven. Consult with your veterinarian before using this product in animals; with clothing disorders; being treated with anticoagulant medications; diabetes; or any metabolic disorder causing hyperglycemia; history of urinary tract stones; known allergies to shellfish. If lameness worsens, discontinue use and contact your veterinarian. Administer during or after the animal has eaten to reduce incidence of gastrointestinal upset. An examination from a veterinarian is recommended prior to using this product.

Shop Prescription Medications from Chewy Pharmacy alt text

See all items by Rx Vitamins

  • Item Number
  • NASC Certified
  • Lifestage
  • Breed Size
    All Breeds, Extra Small & Toy Breeds, Small Breeds, Medium Breeds, Large Breeds, Giant Breeds
  • Food Form
  • Product Form
Nutritional Info

Glocosamine (Sulfate), MSM (Methylsulfonymethane), Sea Cucumber (Pseudo Colochirus Axiologus), Vitamin C (Ascorbic Acid). Inactive Ingredients: Chincory Root & Mung Bean Extract‚ Meltodextrin.

Feeding Instructions
WeightDaily Feeding
up to 50 lbs1/4 to 1/2 scoop
50-75 lbs3/4 scoop
75-100 lbs1 level scoop
over 100 lbs 1 heaping scoop

Why should I include vitamins & supplements in my pet’s diet?

Most commercial pet foods include baseline vitamins and nutrients, but some may not have the adequate amount to suit your pet’s exact health needs. Like in humans, vitamins and supplements can help support your pet’s long-term health, regulating everything from digestion to muscle growth. Consult your veterinarian to determine the best vitamins and supplements for your furry friend.

How often should I give this supplement to my pet?

It is recommended to give the suggested dosage based off your pet’s weight. Please refer to the Feeding Instructions tab and consult with your veterinarian for more information.

Is this supplement safe to use with the medication my pet is currently taking?

If your pet has a medical condition and is taking other medication, we recommend consulting with your veterinarian to ensure that this supplement is safe to use.

My pet is allergic to certain ingredients, will this product be safe to use?

For a complete list of ingredients, click on the 'Nutritional Info' tab, next to the 'Description' tab, just under the product photos. If you are unsure about the safety of this product for your pet, we recommend consulting with your veterinarian.

Does this product come in other product forms?

For a complete assortment of products by the manufacturer of this supplement, click on the link next to the item name at the top of the page. You can also find an assortment of supplements across all product forms on our page.

Rating: 5.0 of 5 stars 1 Review 1 Review 5 out of 5 Stars

Filter reviews by star rating

100% Recommend

100% of reviewersrecommend this product

Rating: 5.0 of 5 stars 5 / 5

You've Already Reviewed This Item

1 Review

Showing 1 Review

  • 5 out of 5 stars

    Finally Found Loose Powder Instead of Pills

    By 4felines on Feb 12, 2020

    I have 4 cats and trying to open the pills to pour on their food was so time-consuming and aggravating. 3 of my cats are senior cats and need this for a better quality of life. So very THANKFUL Chewy carries this!

    You liked it! Something went wrong. Please try again later. Report