American Regent Animal Health has issued a nationwide recall of two lots of Adequan Canine Injection after glass fibers were found during testing of retained samples.

The recall, announced July 31, covers vials distributed to veterinary practices, pharmacies, and wholesalers across the United States, according to the FDA.

Adequan Canine is a prescription drug used to treat non-infectious degenerative or traumatic joint dysfunction in dogs, and it is given as an intramuscular injection by or under the direction of a licensed veterinarian.

Las Vegas dog owners whose pets receive this medication for arthritis or joint pain should ask their vet whether the injections on hand fall under the recalled lots.

The recalled product is Adequan Canine Injection, 100 mg/mL in 5-mL multi-dose vials, under lot numbers 3369 and 25011. Lot 3369 was distributed nationwide starting May 22, 2024, and lot 25011 was distributed starting April 14, 2025.

American Regent said the recall was triggered after glass fibers turned up during internal testing of retained product samples.

Injecting a product containing particulate matter like glass fibers can cause local irritation, swelling, inflammation, injection-site pain, infection, or abscess formation.

The company said it has not received any reports of adverse events tied to the recalled lots as of the announcement.

Any veterinary practice, pharmacy, or dog owner holding the affected lots is advised to stop using the product immediately.

Dog owners with questions about whether their pet has received a recalled dose should contact their veterinarian directly, since Adequan is administered in clinic rather than given at home.