Kalmar "antiadrenergic" sifa ce da ake amfani da ita don bayyana wani magani ko wani abu mai toshewa ko hana ayyukan hormone adrenaline (wanda aka fi sani da epinephrine) da abubuwan da ke cikin jiki. Adrenaline wani hormone ne wanda glandan adrenal ke samar da shi don amsa damuwa ko haɗari, kuma yana taka muhimmiyar rawa wajen amsawar "yaƙin ko tashi" jiki. yanayi iri-iri kamar hawan jini, damuwa, da wasu yanayin zuciya. Wadannan kwayoyi suna aiki ta hanyar rage aikin tsarin juyayi mai tausayi, wanda ke da alhakin amsawar jiki ga damuwa da adrenaline. Hakanan ana iya amfani da su don magance tasirin adrenaline da yawa a cikin yanayi kamar hauhawar jini ko gazawar zuciya.