Pet Safety / Compounds / Diazepam

Is Diazepam safe for dogs and cats?

Low risk for pets

Diazepam is used in veterinary medicine for dogs for seizure management (status epilepticus), pre-anesthetic sedation, treatment of noise phobia, and muscle relaxation. Oral bioavailability in dogs is highly variable and generally poor (25–55%), making IV or rectal administration preferred for acute seizure control. At therapeutic doses, dogs tolerate diazepam well — sedation, ataxia, and paradoxical excitation can occur. The key veterinary safety concern is idiosyncratic hepatotoxicity in cats (not dogs — see cat context); dogs do not demonstrate the same hepatotoxic reaction. Chronic oral diazepam use in dogs may lead to physical dependence with abrupt discontinuation risks similar to humans. Respiratory depression risk with co-administration of opioids, barbiturates, or inhalant anesthetics. Controlled substance — prescription required in all jurisdictions.

What is diazepam?

The IUPAC name is 7-chloro-1-methyl-5-phenyl-3H-1,4-benzodiazepin-2-one.

Also known as: 7-chloro-1-methyl-5-phenyl-3H-1,4-benzodiazepin-2-one, Valium, Ansiolisina, Diazemuls.

IUPAC name
7-chloro-1-methyl-5-phenyl-3H-1,4-benzodiazepin-2-one
CAS number
439-14-5
Molecular formula
C16H13ClN2O
Molecular weight
284.74 g/mol
SMILES
CN1C(=O)CN=C(C2=C1C=CC(=C2)Cl)C3=CC=CC=C3
PubChem CID
3016

Risk for dogs

Low risk

Diazepam is used in veterinary medicine for dogs for seizure management (status epilepticus), pre-anesthetic sedation, treatment of noise phobia, and muscle relaxation. Oral bioavailability in dogs is highly variable and generally poor (25–55%), making IV or rectal administration preferred for acute seizure control. At therapeutic doses, dogs tolerate diazepam well — sedation, ataxia, and paradoxical excitation can occur. The key veterinary safety concern is idiosyncratic hepatotoxicity in cats (not dogs — see cat context); dogs do not demonstrate the same hepatotoxic reaction. Chronic oral diazepam use in dogs may lead to physical dependence with abrupt discontinuation risks similar to humans. Respiratory depression risk with co-administration of opioids, barbiturates, or inhalant anesthetics. Controlled substance — prescription required in all jurisdictions.

Regulatory consensus

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

AgencyYearClassificationNotes
US FDA (Schedule IV DEA controlled substance; approved drug)2022no carcinogenicity classification; DEA Schedule IV controlled substance (Valium); FDA-approved for anxiety, seizures, alcohol withdrawal, muscle spasm, procedural sedation; not listed by NTP or IARC as carcinogen
EPA CTX / IARC—Group 3 - Not classifiable as to its carcinogenicity to humans
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 2 positive / 1 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 2 positive / 1 negative reports)

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 pets encounter diazepam

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

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

  • Therapeutic alternatives (consult prescriber)
    Trade-offs: Drug-specific. Cannot substitute without medical guidance.
    Relative cost: 1.2-2×

Frequently asked questions

Is diazepam safe for pets?

Diazepam is used in veterinary medicine for dogs for seizure management (status epilepticus), pre-anesthetic sedation, treatment of noise phobia, and muscle relaxation. Oral bioavailability in dogs is highly variable and generally poor (25–55%), making IV or rectal administration preferred for acute seizure control. At therapeutic doses, dogs tolerate diazepam well — sedation, ataxia, and paradoxical excitation can occur. The key veterinary safety concern is idiosyncratic hepatotoxicity in cats (not dogs — see cat context); dogs do not demonstrate the same hepatotoxic reaction. Chronic oral diazepam use in dogs may lead to physical dependence with abrupt discontinuation risks similar to humans. Respiratory depression risk with co-administration of opioids, barbiturates, or inhalant anesthetics. Controlled substance — prescription required in all jurisdictions.

What products contain diazepam?

Diazepam appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

Why do regulators disagree about diazepam?

Diazepam has been classified by 4 agencies including US FDA (Schedule IV DEA controlled substance; approved drug), EPA CTX / IARC, EPA CTX / Genetox, EPA CTX / Genetox, with differing conclusions. 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. See the regulatory consensus table on this page for the full picture.

See Diazepam in the pets app

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

Open in pets View raw API data

Sources (2)
  1. FDA Diazepam Valium Prescribing Information 2022: Schedule IV DEA; GABA-A PAM; Active Metabolites Nordiazepam t1/2 40–200h; Pregnancy Category D Neonatal Withdrawal Floppy Infant; Black Box CNS Depression Opioids (2022) — regulatory
  2. WHO Model List Essential Medicines Diazepam: Epilepsy Seizure Management; Pre-operative Sedation; Alcohol Withdrawal; Aquatic Behavioral Effects Fish Oxazepam Metabolite Surface Water Emerging Contaminant (2021) — regulatory

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 →