Baby Safety / Compounds / Fenbendazole

Is Fenbendazole safe for babies and kids?

Context-dependent for kids

(Babies-specific data is limited; this page draws from human pregnant context.) Pregnancy alters the metabolism and distribution of Fenbendazole, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

What is fenbendazole?

Also known as: Panacur, Safe-Guard, Fenbenol, Hoechst 33258.

CAS number
43210-67-9
Molecular formula
C15H13N3O2S
Molecular weight
299.35 g/mol
SMILES
COC(=O)NC1=NC2=C(N1)C=C(C=C2)SC3=CC=CC=C3
PubChem CID
3334

Risk for babies

Context-dependent

Pregnancy alters the metabolism and distribution of Fenbendazole, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of Fenbendazole, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

2 regulatory and scientific bodies have classified Fenbendazole. The classifications differ — that's the data.

AgencyYearClassificationNotes
FDA CVM1983Approved for use in dogs, cattle, horses, swine, game birds
EU/EMA2010MRL established for food-producing animals (Regulation 37/2010)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter fenbendazole

  • Veterinary Medicine
  • Food
  • Off Label Human Use

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Fenbendazole:

  • Mebendazole
    Trade-offs: FDA-approved for human use. Same benzimidazole class. Better human pharmacokinetic data. Also under cancer investigation.
    Relative cost: Higher (human formulation)

Frequently asked questions

No FAQ entries generated.

See Fenbendazole in the baby app

Look up products containing fenbendazole, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. FDA Green Book — Fenbendazole Approvals — fda
  2. Fenbendazole as anti-cancer agent — preclinical evidence — pubmed

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →