Ketamine
Anaesthetics & SedativesA dissociative anesthetic that acts as an NMDA-receptor antagonist, producing a state of anesthesia with loss of pain sensation while some reflexes persist. A controlled substance in many countries.
Pharmacological information
A class-level scientific overview for general reference — no doses. The ultimate reference is always the locally approved product leaflet and consultation with a veterinarian.
Mechanism of action
A dissociative anesthetic that acts as an NMDA-receptor antagonist, producing a state of anesthesia with loss of pain sensation while some reflexes persist. A controlled substance in many countries.
Indications
- Induction and maintenance of anesthesia, usually in combination with a sedative (an alpha-2 agonist or a benzodiazepine)
Contraindications & warnings
- Not usually used alone — may cause muscle rigidity and convulsions
- Caution in heart disease, raised intracranial pressure, and hepatic or renal impairment
Drug interactions
- Synergy with other central nervous system depressants
Human-safety warning
A controlled substance with potential for abuse; it is stored and documented under narcotics regulations, and handling precautions are taken to avoid accidental exposure.
Withdrawal periods
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Horses | 1 days | 1 days | — |
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Horses | 1 days | 1 days | — |
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Cattle | 1 days | zero | — |
| Goats | 1 days | zero | — |
| Horses | 1 days | zero | — |
| Rabbits | 1 days | zero | — |
| Sheep | 1 days | zero | — |
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Horses | 1 days | 1 days | — |
Recorded adverse effects
openFDA veterinary reports — the numbers are report counts, not a severity rate.
Related products
Sources
- •Withdrawal periods: UK Veterinary Medicines Directorate (VMD).
- •European Medicines Agency (EMA) — Veterinary medicines
- •Merck Veterinary Manual — Pharmacology
- •Always verify the locally approved leaflet and consult a veterinarian.