had aspirin ec, phenytoin sodium or potassium chloride been in their current hospital visit prescribed for patient 72909?
select count(*)>0 from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 72909 and admissions.dischtime is null ) and prescriptions.drug in ( 'aspirin ec', 'phenytoin sodium', 'potassium chloride' )