In adults with meningitis, treatment should be symptomatic and supportive depending on the patient’s symptoms and the infecting flora. If the patient has increased intracranial pressure mannitol should be given to dehydrate and lower cranial pressure, if there are symptoms of hyperthermia physical cooling or antipyretics should be used to treat the patient, and the rest of the medications should be selected according to the type of bacterial or viral infection the patient has. If the patient has septic meningitis, antibiotics should be administered as early as possible and broad-spectrum antibiotics should be used until the pathogenic organism is identified. If the pathogenic bacteria are identified choose antibiotics that are sensitive to the pathogenic bacteria and apply them in full doses and courses, with third-generation ceftriaxone as the drug of choice for septic meningitis. If the pathogenic organism is identified, for example, the patient is septic meningitis caused by Streptococcus pneumoniae, which is more sensitive to penicillin.