what was the name of the drug, which patient 54281 had been prescribed two or more times until 8 months ago?
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 = 54281 ) and datetime(prescriptions.startdate) <= datetime(current_time,'-8 month') group by prescriptions.drug ) as t1 where t1.c1 >= 2