Ketamine
Ketamine</u
Ketamine is a Class-B drug in the United Kingdom that was first indroduced in the 1960s as an anaesthetic agent and has been widely used in both the vetinary and medical world[1]
Ketamines full chemical name is 2-chlorophenyl-2-methylamine-cyclohexanone.[1]
It is a classified narcotic due to its dissociative nature; often reported to give effects such as hallucinations, paranoia, 'floating sensations' and vast changes in sensory perceptions[2], it's able to give this psychoactive reaction as well as the pain reducing effects due to being a glutamate receptor antagonist; such as the NMDA recptor, one of the most prolific in ketamines pharmacological action.
References
[1] - Arditti, J. Ketamine - dreams and realities.(2002)