have captopril, glucagon, or folic acid been ordered since 4 years ago for patient 2518?
select count(*)>0 from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 2518 ) and prescriptions.drug in ( 'captopril', 'glucagon', 'folic acid' ) and datetime(prescriptions.startdate) >= datetime(current_time,'-4 year')