These pages contain safety information on products regulated by the FDA Center for Veterinary Medicine (CVM).

“Dear Veterinarian” Letters

COVID-19

• CVM Letter to Veterinarians and Retailers: Help Stop Misuse of Animal Ivermectin to Prevent or Treat COVID-19 in Humans (En Español) (Em Português)

Animal Cell-Based Products

• FDA issues letter to veterinarians on the development & use of animal cells, tissues, and cell- and tissue-based products (ACTPs)

Cattle

• FDA Clarifies Use of Tylosin Phosphate in Beef Cattle

Horses

• Dear Veterinarian Letter advising veterinarians to use Zycosan (pentosan polysulfate sodium injection) instead of unapproved drugs in their equine patients

Cats

• Dear Veterinarian Letter advising veterinarians of important safety conditions associated with the use of Bexacat (bexagliflozin tablets) for improving glycemic control in certain cats with diabetes mellitus

---

 "Dear Aquaculture Professional" Letters

• FDA-approved fish drugs

---

Letters to Pharmacy Professionals

• Dear Pharmacy Professional Letter advising pharmacies to dispense Zycosan (pentosan polysulfate sodium injection) instead of unapproved drugs for equine patients

---

Letters to Veterinary Schools

• FDA letter to universities on the development of animal cells, tissues, and cell- and tissue-based products (ACTPs)
• FDA’s Letter to Veterinary Schools regarding Animal Cell-Based Products

---

Older letters can be accessed through the FDA Archive.