instruction: provide the number of patients whose diagnoses long title is shock, unspecified and drug route is buccal?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id WHERE diagnoses.long_title = "Shock, unspecified" AND prescriptions.route = "BUCCAL"