nerve agent; nerve gas
Refers to chemical weapons that disrupt the nervous system, such as sarin or VX. Often used in military or security contexts.
See also: 神経ガス (しんけいガス)
That country was accused of using nerve agents.
Antidotes for nerve agents must be administered immediately.
nerve tonic
Medical term for a preparation intended to strengthen or calm the nerves. Less common in everyday language; may appear in older or alternative medicine contexts.
The doctor prescribed a nerve tonic for me.