Study maps stage-specific diclofenac embryo risk in chicken model

A new paper in Veterinary Sciences reports that diclofenac sodium caused embryo death in a stage-dependent pattern in the in ovo chicken embryo model, with susceptibility varying by both dose and timing of exposure. The study, by Harun Kizilay and Seyma Tetik Rama, adds to a broader body of literature showing diclofenac’s developmental toxicity across non-mammalian models, including chick and frog embryos, and reinforces concerns that this NSAID can have meaningful toxic effects during early development. Prior research has also linked diclofenac to toxicity in multiple avian species, including the well-documented risk to vultures from veterinary exposure. (sciencedirect.com)

Why it matters: For veterinary professionals, the main takeaway isn’t that diclofenac use in companion animals is suddenly changing, but that timing of exposure may be as important as dose when developmental risk is assessed. The chicken embryo model is widely used in toxicology screening because it can identify critical windows of susceptibility, and this paper may help inform how researchers, regulators, and clinicians think about reproductive safety, avian toxicology, and comparative developmental risk for NSAIDs. (pubs.acs.org)

What to watch: Watch for follow-up work that tests whether these stage-specific findings translate into practical reproductive safety signals in live avian species, mammals, or veterinary drug risk assessments. (sciencedirect.com)