instruction: what are the top five prescribed drugs for patients aged 60 or above?
response: SELECT t1.drugname FROM (SELECT medication.drugname, DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) AS c1 FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.age >= 60) GROUP BY medication.drugname) AS t1 WHERE t1.c1 <= 5