ANTITOKSINHO (az anti… va toksinho), moddahoi makhsus (podtanho), ki dar organizm hangomi ba on roh yoftani zahri bakteriya yo jonvaron hosil meshavand. A. zahri mikrobhoi bemoriangezro bezarar megardonand. A.-ro dar organizmi hayvonot bo rohi suni hosil mekunand; baroi in avval az zahri mikrob anatoksin tayyor karda, on bad ba zeri bofta (mas., ba zeri boftahoi asp) chand marotiba vorid karda meshavad. Dar natija dar organizmi asp A. hosil megardand. Zardobi khuni chunin aspro baroi muolijai guluzindonak, botulizm, kuzoz va dig. bemoriho istifoda mebarand. Faoliyati A. bo vohidi baynalmilali (ME) chen karda meshavad. Nig. niz Podtanho, Podzahr.