Tonic may refer to:Tonic water, a drink traditionally containing quinine Regional name for soft drink—a carbonated beverage, used in eastern Massachusetts and parts of Maine and New Hampshire. Tonic (physiology), the response of a muscle fiber or nerve ending typified by slow, continuous action Tonic syllable, the stressed syllable of a word Herbal tonic, a herbal medicine with tonic effects Tonic (music), the tonal center of a musical scale Tonic (band), an American rock band Tonic , 2010 Tonic, a New York City music venue, 1998–2007 Tonic , 2000 Tonic , Canadian radio program Tonic suit, a garment made from a shiny mohair blend that was fashionable among the Mods of the mid-1960s Tonic (film), a Bengali film