1. Local anaesthetics:
It causes loss of sensation in the area in which it is applied without losing consciousness. They block pain perception that is transmitted via peripheral nerve fibres to the brain.
Example: Procaine, Li do Caine. They are often used during minor surgical procedures.
2. General anaesthetics:
They cause a controlled and reversible loss of consciousness by affecting central nervous system.
Example: Propofol, Isoflurane. They are often used for major surgical procedures.
