Pentobarbital Sodium
Also known as: Nembutal
**Important Information for Pet Owners:** * **Post-Anesthesia Care:** Your pet may experience a rough recovery (vocalization, paddling, or excitement) as the drug wears off. Keep them in a quiet, dimly lit, and safe environment to prevent injury. * **Temperature Control:** Pentobarbital can lower body temperature. Keep your pet warm and comfortable, but avoid direct heat sources like heating pads which can cause burns. * **Nursing Pets:** This medication passes into breast milk and can cause drowsiness in nursing newborns. * **Toxicity Warning:** Never allow pets to scavenge or consume the remains of animals that have been euthanized. Pentobarbital persists in tissues and can cause fatal poisoning if ingested.
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
How it is given
Possible side effects
- Respiratory depression (can be severe)
- Hypothermia
- Paradoxical excitement during recovery (especially in dogs)
- Cardiovascular depression (decreased contractility, hypotension)
- Severe tissue irritation and necrosis (if given perivascularly or SC)
Cautions & contraindications
- Known hypersensitivity to barbiturates
- Severe liver disease
- Nephritis
- Severe respiratory depression
- Lidocaine-induced seizures
- Pregnancy (Category D - embryotoxic/teratogenic)
- Administer IV SLOWLY (unless used for euthanasia). Very irritating if given SC or perivascularly; do NOT give intra-arterially (IA). Use cautiously in patients who are hypovolemic, anemic, or have borderline hypoadrenal, cardiac, or respiratory disease. Cats (especially females) are particularly sensitive to respiratory depressant effects. Use with caution in neonates due to higher CNS penetration.
Drug interactions
- Acetaminophen: Increased risk for hepatotoxicity, particularly with large or chronic barbiturate doses.
- Lidocaine: Fatalities reported when treating lidocaine-induced seizures with pentobarbital; use diazepam instead.
- Phenytoin: Barbiturates may affect phenytoin metabolism and vice versa; blood level monitoring indicated.
- Rifampin: May induce enzymes that increase the metabolism of barbiturates.
- Antihistamines: May increase the CNS depressant effect of pentobarbital.
- Chloramphenicol: May increase the CNS depressant effect of pentobarbital.
- Opiates: May increase the CNS depressant effect of pentobarbital.
- Phenothiazines: May increase the CNS depressant effect of pentobarbital.
Frequently asked questions
What is Pentobarbital Sodium used for in pets?
**Important Information for Pet Owners:** * **Post-Anesthesia Care:** Your pet may experience a rough recovery (vocalization, paddling, or excitement) as the drug wears off. Keep them in a quiet, dimly lit, and safe environment to prevent injury. * **Temperature Control:** Pentobarbital can lower body temperature. Keep your pet warm and comfortable, but avoid direct heat sources like heating pads which can cause burns. * **Nursing Pets:** This medication passes into breast milk and can cause drowsiness in nursing newborns. * **Toxicity Warning:** Never allow pets to scavenge or consume the remains of animals that have been euthanized. Pentobarbital persists in tissues and can cause fatal poisoning if ingested.
Is Pentobarbital Sodium safe for my pet?
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
This article is for general education and is not a substitute for professional veterinary advice. If your pet is unwell, please consult a veterinarian.
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