what was the dose of metronidazole (flagyl) that was prescribed to patient 27703 the last time in 11/this year?
select prescriptions.dose_val_rx from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 27703 ) and prescriptions.drug = 'metronidazole (flagyl)' and datetime(prescriptions.startdate,'start of year') = datetime(current_time,'start of year','-0 year') and strftime('%m',prescriptions.startdate) = '11' order by prescriptions.startdate desc limit 1