instruction: what's the name of the drug that patient 41393's been prescribed two or more times until 03/2103?
response: SELECT t1.drug FROM (SELECT prescriptions.drug, COUNT(prescriptions.startdate) AS c1 FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 41393) AND STRFTIME('%y-%m', prescriptions.startdate) <= '2103-03' GROUP BY prescriptions.drug) AS t1 WHERE t1.c1 >= 2