instruction: count the number of patients whose primary disease is hypertension;rule out coronary artery disease/cardiac cath and drug route is sc.
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id WHERE demographic.diagnosis = "HYPERTENSION;RULE OUT CORONARY ARTERY DISEASE\CARDIAC CATH" AND prescriptions.route = "SC"