Answer: epinephrine

AnswerCrossword Clue
EPINEPHRINEAdrenal gland output
EPINEPHRINEAsthma sufferer's relief
epinephrineA hormone secreted by the adrenal glands, esp. in conditions of stress, increasing rates of blood circulation, breathing, and carbohydrate metabolism and preparing muscles for exertion
epinephrineadrenalin also EPINEPHRIN