what medication was first prescribed to patient 23858 via the in route since 114 months ago?
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 23858 ) and prescriptions.route = 'in' and datetime(prescriptions.startdate) >= datetime(current_time,'-114 month') order by prescriptions.startdate asc limit 1