when was the last time patient 65569 was prescribed a drug through iv route in 05/this year?
select prescriptions.startdate from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 65569 ) and prescriptions.route = 'iv' and datetime(prescriptions.startdate,'start of year') = datetime(current_time,'start of year','-0 year') and strftime('%m',prescriptions.startdate) = '05' order by prescriptions.startdate desc limit 1