instruction: what was the name of the drug, which was prescribed to patient 25796 for the last time in the last hospital visit?
response: SELECT prescriptions.drug FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 25796 AND NOT admissions.dischtime IS NULL ORDER BY admissions.admittime DESC LIMIT 1) ORDER BY prescriptions.startdate DESC LIMIT 1