Rx Vitamins

About Rx Vitamins for Pets

Craig Kisciras founded Rx Vitamins for Pets in 1998 with one clear conviction: veterinarians deserved access to nutraceutical formulas that were actually built on science rather than marketing. As one of the founding members of the National Animal Supplement Council, the brand helped shape the quality audit framework the entire supplement industry now benchmarks against. Every formula is researched, developed, and personally tested by Chief Medical Officer Dr. Robert J. Silver, a practising small animal veterinarian with over 30 years of integrative medicine experience. In 2021 the brand joined the Swedencare group, broadening its international reach while keeping its veterinary-first philosophy intact.

Rx Vitamins for Pets Product Range

Liver Support: Hepato Support is anchored by a concentrated milk thistle extract standardised to 80% silymarin, with a full B vitamin complex and alpha lipoic acid rounding out the formula. The silymarin component is specifically valued for its role in preserving glutathione within the liver, while the B vitamins contribute to healthy tissue regeneration. A Liquid Hepato version delivers the same active ingredients in a flavoured liquid for pets that will not take capsules.

Kidney Support: Rx Renal for Dogs pairs milk thistle extract with green tea and cordyceps mushroom to support healthy renal function in dogs with kidney health concerns. A dedicated feline renal formula addresses the same needs in cats, both designed to sit alongside a veterinarian's chronic kidney management approach.

Joint and Mobility Support: NutriFlex delivers glucosamine sulfate, bovine cartilage, and sea cucumber alongside plant-based support from curcumin, ginger, and boswellia. Available as beef liver-flavoured chewtabs, it covers cartilage integrity, tendon health, and comfortable daily movement in a format most dogs genuinely enjoy.

Metabolic and Appetite Support: Amino B-Plex is a concentrated liquid combining B complex vitamins, essential amino acids, potassium, and iron. It is designed for pets that are weak, not eating well, post-surgical, or physically depleted by chronic illness, giving the body what it needs to rebuild metabolic momentum.

Heart and Cardiovascular Support: Formula CV brings hawthorn berry together with taurine, magnesium, and potassium to support healthy cardiac function. It is a practical daily supplement for senior dogs and cats where cardiovascular health needs ongoing nutritional attention.

Omega and Coat Support: Ultra EFA Omega-3 Fish Oil is enriched with vitamin E, biotin, and zinc for skin and coat support alongside heart, brain, and joint benefits. Available as a liquid that goes directly over food for easy daily use in dogs and cats.

Why Buy Rx Vitamins for Pets from HardyPaw?

• Genuine, Authentic Products: Every Rx Vitamins formula at HardyPaw is fully authentic, carrying the same veterinarian-developed ingredients your vet would source directly from the brand.
• US-Based Licensed Pet Pharmacy: HardyPaw is a US-based licensed pet pharmacy and pet essentials brand, giving you a verified and compliant source for clinic-grade nutraceuticals that are typically only available through veterinary channels.
• Ships Internationally: HardyPaw ships Rx Vitamins products from the United States to customers worldwide, so pet parents anywhere can access these professional veterinary formulas without needing a local clinic connection.
• Competitive Pricing and Value: The complete Rx Vitamins range is available at competitive prices, with multi-pack options that support long-term supplementation without stretching the budget.
• Expert Pet Health Support: Our team can match your pet's specific health situation to the right Rx Vitamins formula, whether the concern is liver health, kidney function, joint mobility, or metabolic recovery.

Why Vets Trust Rx-Vitamins?

• Veterinarian-Formulated Since 1998: Every formula is personally researched, developed, and tested by Dr. Robert J. Silver, a practising integrative veterinarian who has spent over 30 years applying nutraceutical science to real clinical outcomes and speaking at veterinary conferences worldwide.
• FDA-Inspected, cGMP-Compliant Manufacturing: All products come out of FDA-inspected, cGMP-compliant facilities where rigorous assay testing is applied to both incoming raw materials and the finished product before anything ships.
• NASC Founding Member: Rx Vitamins helped establish the National Animal Supplement Council from the ground up, contributing to the independent audit framework that now serves as the quality standard across the entire industry.
• Comprehensive Veterinary Technical Documentation: Every formula ships with a detailed technical document covering each ingredient and the reasoning behind its inclusion, made available to veterinary professionals who want to understand exactly what they are recommending.
• Part of Swedencare's Global Pet Health Network: Since joining Swedencare in 2021, Rx Vitamins has access to research infrastructure and distribution reaching approximately 65 countries, while continuing to operate under its founding veterinary-first principles.

Frequently Asked Questions About Rx Vitamins for Pets

Q1: What is Rx Vitamins for Pets and who are the products designed for? 

Ans: Rx Vitamins for Pets is a veterinary nutraceutical company that has been building condition-specific supplement formulas since 1998. The range was developed for use within veterinary care plans, targeting dogs and cats dealing with organ-specific health challenges including liver stress, kidney concerns, joint deterioration, cardiovascular needs, and metabolic weakness.

Q2: What is Hepato Support and when should my pet take it? 

Ans: Hepato Support is built around milk thistle extract, B vitamins, and alpha lipoic acid, a combination chosen specifically to protect liver cells, preserve glutathione, and support tissue recovery. Vets typically reach for it when a pet is showing elevated liver enzymes or needs ongoing hepatic nutritional backing as part of a longer treatment plan.

Q3: What does Amino B-Plex do for dogs and cats? 

Ans: Amino B-Plex steps in when a pet's body is running low on the building blocks it needs to function properly. The concentrated liquid delivers B vitamins, essential amino acids, potassium, and iron, giving pets recovering from surgery, managing chronic illness, or simply not eating enough a targeted nutritional boost when food intake alone is not cutting it.

Q4: Are Rx Vitamins supplements safe for long-term daily use? 

Ans: The formulas are produced in FDA-inspected, cGMP-compliant facilities with assay testing built into every production run, so consistency and safety are not left to chance. That said, pets managing organ-specific conditions do better with a vet keeping tabs on how they are responding, since what works well at one stage of an illness may need adjusting at another.

Q5: What is NutriFlex and how does it support joint health? 

Ans: NutriFlex pairs three chondroprotective agents, glucosamine sulfate, bovine cartilage, and sea cucumber, with anti-inflammatory plant compounds including curcumin, ginger, and boswellia. The combination targets cartilage integrity and connective tissue health from multiple angles rather than relying on a single ingredient to carry the load.

Q6: Do Rx Vitamins products require a veterinary prescription? 

Ans: Most products in the range are sold as over-the-counter nutraceuticals and do not require a prescription to purchase. That said, they were built to work within a veterinary care plan, so starting any condition-specific supplement without checking with a vet first is not the smartest move, especially when a pet is already dealing with an organ disease or chronic health issue.

Q7: Is Rx Vitamins suitable for both dogs and cats? 

Ans: Yes, the range covers both species. Dosing guidelines are species-specific and clearly outlined on every product, so while the formulas themselves are shared, how much you give and how often will differ depending on whether you have a dog or a cat on the other end of the bowl.

Q8: What makes Rx Vitamins different from generic pet supplements? 

Ans: The difference starts with who builds the formulas. Every Rx Vitamins product is designed by a clinically active veterinarian rather than a product team, backed by a full technical document, and produced in a facility that gets inspected. Most generic supplements cannot say any of those three things, let alone all of them together.

Q9: Where can I buy Rx Vitamins for Pets in the US and internationally? 

Ans: The full Rx Vitamins range, including Hepato Support, Amino B-Plex, NutriFlex, Rx Renal, and Ultra EFA Omega-3, is available through HardyPaw. HardyPaw is a US-based licensed pet pharmacy and pet essentials brand that ships domestically across the United States and internationally to pet parents worldwide.