Some Iverhart Plus Heartworm Preventive Tablets Recalled

Iverhart heartworm preventive recallVirbac Animal Health has voluntarily recalled six lots of Iverhart Plus Flavored Chewables, a heartworm and internal parasite preventive, because the potency of the ingredient ivermectin did not meet the company’s stability specifications.

Dogs that are in the upper third of each weight range of the following recalled lots may not be getting full protection from heartworms:

  • Lot 120076 (Large dogs 51-100 pounds)
  • Lot 120086 (Large dogs 51-100 pounds)
  • Lot 120856 (Large dogs 51-100 pounds)
  • Lot 120202 (Medium dogs 26-50 pounds)
  • Lot 120196 (Small dogs up to 25 pounds)
  • Lot 120844 (Small dogs up to 25 pounds)

The lot number is stamped on the side lid or flap of the box, and on the blister foil of individual doses.

According to, Virbac Animal Health sent a letter to distributors informing them of the recall. The company stated that the tablets met all of the stability specifications when they were distributed. However, further product testing found that the ivermectin potency failed to meet stability specifications during the life of the product.

In April 2012 Virbac Animal Health recalled one lot of Iverhart Max Chewable Tablets for the same reason. Iverhart Max products are not included in this latest recall.

If you have questions or concerns about the recall, call Virbac Technical Services at 800-338-3659, ext. 3052.


Laura Goldman

Laura Goldman is senior social media writer for i Love Dogs, Inc. She does love dogs. And elephants and turtles. Along with writing about the loves of her life, Laura likes to play with her two pound pups and tell anyone who'll listen just how awesome Pit Bulls are.

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