instruction: what was the name of the drug that was first prescribed to patient 012-30018 in 03/2105 via the intravenous route?
response: SELECT medication.drugname FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '012-30018')) AND medication.routeadmin = 'intravenous' AND STRFTIME('%y-%m', medication.drugstarttime) = '2105-03' ORDER BY medication.drugstarttime LIMIT 1