instruction: what was the total dose of aspirin that had been prescribed to patient 19175 during the last month?
response: SELECT SUM(prescriptions.dose_val_rx) FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 19175) AND prescriptions.drug = 'aspirin' AND DATETIME(prescriptions.startdate, 'start of month') = DATETIME(CURRENT_TIME(), 'start of month', '-1 month')