how many hours has passed since the last time that patient 10624 has been prescribed miconazole powder 2% on their current hospital visit?
select 24 * ( strftime('%j',current_time) - strftime('%j',prescriptions.startdate) ) from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 10624 and admissions.dischtime is null ) and prescriptions.drug = 'miconazole powder 2%' order by prescriptions.startdate desc limit 1