what was the first drug prescribed to patient 31696 since 62 months ago via the ou route?
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 31696 ) and prescriptions.route = 'ou' and datetime(prescriptions.startdate) >= datetime(current_time,'-62 month') order by prescriptions.startdate asc limit 1