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Are unknown ingredients in Frontline Plus or Advantage II safe?

Updated On September 23rd, 2025

Frontline Plus & Advantage II have at least 75% ingredients listed as "other". I have been unable to find what these "other" ingredients are. Should I be concerned? thank you Tammy

1 Answer

Most Helpful Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on June 10th, 2019

These products are generally well tolerated but any pet can have a reaction. The best person to contact regarding the ingredients is the manufacturer who produces these products. Make sure to purchase your products in-store. There have been problems with counterfeit and mislabeled products from online pharmacies. If these are products your pet has never used, calling your veterinarian for advice would be a good idea since they are most familiar with your pet. Best of luck.

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