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This page contains information on MegaFlex for veterinary use.
The information provided typically includes the following:
  • MegaFlex Indications
  • Warnings and cautions for MegaFlex
  • Direction and dosage information for MegaFlex


This treatment applies to the following species:
Manufacturer: Rx Vitamins

Rx Vitamins™ For Pets

Professional Veterinary Formulas

For Dogs & Cats

Glucosamine, MSM and Sea Cucumber Supplement

Nutritional Support For Joint Maintenance, Strength And Flexibility

Formulated By Robert J. Silver, D.v.m., M.s.

Product Facts

Active Ingredients Per 1 Scoop

Glucosamine (sulfate)

1000 mg.

MSM (methylsulfonylmethane)

500 mg.

Sea Cucumber (pseudo-colochirus axiologus)

300 mg.

Vitamin C (ascorbic acid)

10 mg.

Inactive Ingredients

Beflora (soy and fructooligosaccharide complex) and maltodextrin.

For use in canine and feline patients.

Recommended to help maintain joint health, strength and flexibility.

Directions For Use

One (1) heaping scoop for very large dogs (over 100 lbs.)

One (1) level scoop for large dogs (75-100 lbs.)

3/4 scoop for medium-sized dogs (50-75 lbs.)

1/4 to 1/2 scoop for small dogs and cats (up to 50 lbs.)

Dosage may be doubled for the initial 4-8 weeks of treatment for a more rapid response.

Please consult with your veterinarian regarding your pet’s individual dosing schedule.


For animal use only. Keep out of the reach of children and other animals.

In case of accidental overdose, contact a health professional immediately.

Administer during or after the animal has eaten to reduce incidence of gastrointestinal upset.

Keep tightly closed in a cool, dry place out of direct sunlight.


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 clotting 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.

Formulated and Distributed by Rx Vitamins™ Inc., Elmsford, NY 10523

(800) 792-2222

600 gm (21.16.oz.) Powder

Nac No.

Telephone:   914-592-2323
Toll-Free:   800-792-2222
Fax:   914-592-2364
Toll-Free Fax:   888-800-8068
Every effort has been made to ensure the accuracy of the MegaFlex information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2018 North American Compendiums. Updated: 2018-05-30