tell me the last medicine that was prescribed to patient 11823 in 11/last year.
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 11823 ) and datetime(prescriptions.startdate,'start of year') = datetime(current_time,'start of year','-1 year') and strftime('%m',prescriptions.startdate) = '11' order by prescriptions.startdate desc limit 1