Glow is a street drug derived from the empathogen–entactogen neonazacyclicdienorthoamphetamine, more commonly known as neon. Sold in the form of brightly-colored capsules, when it is taken orally it can leave a glowing residue on the tongue. It was formulated by unknown makers to have a more potent effect on the nervous system than neon, which in turn creates more euphoric feelings and fewer hallucinations in its users. Once the effect wears off, however, some users experience days of suicidal depression as their brain chemistry normalizes.