instruction: what was the first medication prescribed to patient 006-158759 in 03/last year via 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 = '006-158759')) AND medication.routeadmin = 'intravenous' AND DATETIME(medication.drugstarttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year') AND STRFTIME('%m', medication.drugstarttime) = '03' ORDER BY medication.drugstarttime LIMIT 1