###HUMAN: tell me the name of the drug to which patient 007-849 was allergic in this hospital encounter?, ###ASSISTANT: SELECT allergy.drugname FROM allergy WHERE allergy.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '007-849' AND patient.hospitaldischargetime IS NULL))