instruction: how many patients had been prescribed 100 ml bag : sodium chloride 0.9 % 0.9 % iv solp?
response: SELECT COUNT(DISTINCT patient.uniquepid) FROM patient WHERE patient.patientunitstayid IN (SELECT medication.patientunitstayid FROM medication WHERE medication.drugname = '100 ml bag : sodium chloride 0.9 % 0.9 % iv solp')