N-Ethylhexedrone (also known as NEH and hexen) is a novel stimulant substance of the cathinone class. N-Ethylhexedrone is a derivative of hexedrone and belongs to a group of compounds known as the substituted cathinones. Little is known about its pharmacology, although it likely works by increasing levels of norepinephrine and dopamine in the brain.

The original synthesis date of N-ethylhexedrone is unknown, but it began to appear on the online research chemical market in late 2015. It is an example of a novel psychoactive substance specifically chosen to mimic the features of prohibited substances and bypass drug laws. It is one of a number of substances collectively referred to in popular culture as "bath salts".