Mucinex is historically not DXM, it's Guaifenesin, that's what they built their brand on. Recently they've revised their ingredients because Guaifenesin is a m

Mucinex is historically not DXM, it's Guaifenesin, that's what they built their brand on. Recently they've revised their ingredients because Guaifenesin is a mild stimulant and they know that shoppers are not reading the active ingredients. It was recently impossible for me to purchase pure Guaifenesin because the pharmacy only carries Mucinex DM/whatever rather than the original product, and all Mucinex day/night products contained Acetaminophen.