what was the name of the medication which was prescribed to patient 27362 the first time in 05/2104?
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 27362 ) and strftime('%y-%m',prescriptions.startdate) = '2104-05' order by prescriptions.startdate asc limit 1