TY - CHAP M1 - Book, Section TI - Headache A1 - Weber, Joseph M. A2 - Sherman, Scott C. A2 - Weber, Joseph M. A2 - Schindlbeck, Michael A. A2 - Rahul G., Patwari Y1 - 2014 N1 - T2 - Clinical Emergency Medicine AB - Consider emergent causes of headache first.Have a low threshold to perform a computed tomography (CT) scan on patients with a possible emergent cause for their headache.Never delay administering antibiotics while waiting for a CT scan or lumbar puncture (LP) when considering the diagnosis of bacterial meningitis.When subarachnoid hemorrhage is suspected, follow a normal CT scan with LP. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1101228454 ER -