ethenzamide ethenzamide ethenzamide (2-ethoxybenzamide) is a common analgesic and anti-inflammatory drug that is used for the relief of fever, headaches, and other minor aches and pains. it is also an ingredient in numerous cold medications and many prescription analgesics. it is used as an over-the-counter drug in japan, often in combination with caffeine and acetaminophen, where it is marketed for uses including toothache, menstrual cramps, headache, and fever. ethenzamideclinical dataatc coden02ba07 (who) identifiers iupac name 2-ethoxybenzamide cas number938-73-8 ypubchem cid3282chemspider3167 yuniil929zck4bfkeggd01466 ychemblchembl1483877comptox dashboard (epa)dtxsid4020581 echa infocard100.012.133 chemical and physical dataformulac9h11no2molar mass165.192 g·mol−13d model (jsmol)interactive image smiles o=c(c1ccccc1occ)n inchi inchi=1s/c9h11no2/c1-2-12-8-6-4-3-5-7(8)9(10)11/h3-6h,2h2,1h3,(h2,10,11) ykey:sbnkftqsbpkmbz-uhfffaoysa-n y (verify) it is metabolized in vivo into salicylamide.