Is Vivitonin Approved for Dogs in the United States? How the UK Label Changes the Answer

Vivitonin is authorized in the United Kingdom, and a UK authorization is not FDA approval. The UK Veterinary Medicines Directorate (VMD) lists Vivitonin 100 mg tablets for dogs as an authorized propentofylline product. A UK record carries no US application number and cannot show whether FDA has an animal-drug record for propentofylline. That has to be checked in Animal Drugs @ FDA, not inferred from the UK label, a retailer listing or a secondary reference.

Two regulators, two records

The UK product information was revised in October 2025. A different country authorizes the same brand separately: Ireland's regulator lists Vivitonin 100 mg film-coated tablets for dogs as authorized since September 21, 2001 under its own license number.

What the UK label does and does not establish

The UK record establishes that a veterinary medicine with this name, strength and holder is authorized in the United Kingdom for dogs. It does not create a US application number, and it does not describe how FDA would regard the product.

The UK indication is about dullness, lethargy and demeanour. It does not name canine cognitive dysfunction or dementia. Marketing material that calls the product a treatment for either condition goes beyond the UK label's wording, and label wording is not evidence for a disease claim.

The UK product information also lists restrictions that belong to that authorization. It says not to use the product in pregnant bitches or breeding animals, or in cases of hypersensitivity to the active substance or any excipient. It says the dose should be reduced in renal failure, and that consideration should be given to rationalising the medication of dogs already treated for congestive heart failure or bronchial disease. A veterinarian decides whether any of these apply to a particular dog. This article gives no dose or recommendation.

Searching the FDA record

FDA states that the words "Approved by FDA" are mandatory on most labeling components for approved animal drugs. Every FDA-approved animal drug has a six-digit application number, shown as "Approved by FDA under NADA # XXX-XXX" for a brand-name drug or "Approved by FDA under ANADA # XXX-XXX" for a generic. A conditionally approved drug instead carries "Conditionally approved by FDA pending a full demonstration of effectiveness under application number XXX-XXX".

1. Read the pack. A UK pack will show UK statements, not an FDA application statement.

2. Search Animal Drugs @ FDA. It is a searchable database that includes most FDA-approved and conditionally approved animal drugs. Search for both "Vivitonin" and "propentofylline".

3. Check the Green Book. Section 1.1 lists approved animal drugs by trade name, Section 1.2 by application number, and Section 2 by active ingredient.

4. Compare, don't infer. A match on the ingredient alone does not make a different product the same one. Check the application number, species, strength, dosage form and indication.

A search that returns no matching record is a finding about FDA's records. It is not proof that a product is counterfeit or unlawful in every context. Record it as "no matching record located" with the search terms and the date.

Match the pack and keep the result

Photograph the carton, blister strip and any pharmacy label. Then compare these fields with the UK record:

• Product name and strength, such as 50 mg or 100 mg.

• Active ingredient and the amount per tablet.

• Marketing authorization holder and the authorization number printed on the pack.

• Pack size, which is 60 tablets for the UK 100 mg pack.

• Prescription-only statement, and the country or language of the packaging.

• Lot number and expiration date.

• Any FDA statement, which a US-approved drug would carry and a UK pack would not.

Keep a short record: the UK product record and authorization number you matched, the FDA databases you searched with the exact terms and the date, and the result of each search. If the pack, the UK record and any US information do not agree, note the specific mismatch.

Bring the record to the veterinarian. Ask which product is being proposed, whether any US-authorized option fits the dog's condition, and whether the proposed product can be lawfully dispensed in the United States. Sourcing, shipping and legal-use questions belong with the veterinarian and the dispensing pharmacy, and neither the UK label nor the FDA search answers them.

References

• UK Veterinary Medicines Directorate: Vivitonin 100 mg Tablets for Dogs, Product Information Database record

• MSD Animal Health UK: Vivitonin questions and answers

• NOAH Compendium: Vivitonin tablets for dogs, marketing authorisation number

• HPRA (Ireland): Vivitonin 100 mg film-coated tablets

• FDA: "Approved by FDA" is mandatory on labeling for approved animal drugs