Many<unk> s fall into two general chemical classes, amino esters (top) and amino amides (bottom) A<unk>  <unk>  is a medication that causes absence of pain sensation. In the context of surgery, a<unk>  creates an absence of pain in a specific<unk> ion of the body without a loss of consciousness, as opposed to a general anesthetic. When it is used on specific nerve pathways<unk>  nerve block), paralysis (loss of muscle power) also can be achieved.
Local anesthetic
Muscle relaxant
Equianalgesic
Inhalational anesthetic
General anaesthetic
Querulant
Analgesic
Local anesthesia