instruction: what is the drug that patient 006-71495 was prescribed two or more times until 46 months ago?
response: SELECT t1.drugname FROM (SELECT medication.drugname, COUNT(medication.drugstarttime) AS c1 FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '006-71495')) AND DATETIME(medication.drugstarttime) <= DATETIME(CURRENT_TIME(), '-46 month') GROUP BY medication.drugname) AS t1 WHERE t1.c1 >= 2