A m'ren was a syntheholic beverage served at the bar on Narendra Station in the 2380s. A form of champagne, it was pink and bubbly, and typically served in a large fluted glass. (Clear Skies: "The Edge of the Unknown")
According to Solun, the ingredients of a m'ren could render some people "loopy," though not intoxicated, but the effect would only last briefly. Lieutenant Jane Lakat experienced this shortly after the USS Ross arrived at the starbase. After "shooting" a m'ren, she became rather talkative and uninhibited, in contrast to her usual circumspect nature.
The m'ren was a syntheholic version of an alcoholic beverage, the recipe for which was said to have "fell out of the sky from a another universe." (Clear Skies: "The Edge of the Unknown")