There are many available injectable anaesthetic agents. These include:
- Ketamine (in combination with a sedative)
- Hypnorm (with midazolam or diazepam)
- Etomidate (with fentanyl)
- Pentobarbital – produces light anaesthesia, at higher doses surgical anaesthesia is produced but the safety margin is very narrow. A further disadvantage is that full recovery from this anaesthetic could take several hours.