Hydroxyzine (/haÉªËdrÉksÉ¨ziËn/ ; sold as Vistaril, Atarax) is a first-generation antihistamine of the diphenylmethane and piperazine class.It was first synthesized by Union Chimique Belge in 1956 and was marketed by Pfizer in the United States later the same year, and is still in widespread use today.ydroxyzine (/haÉªËdrÉksÉ¨ziËn/ ; sold as Vistaril, Atarax) is a first-generation antihistamine of the diphenylmethane and piperazine class.
Meningitis can also be caused by the direct spread of a nearby severe infection, such as an ear infection (otitis media) or a nasal sinus infection (sinusitis). An infection can also occur any time following direct trauma to the head or after any type of head surgery.
Meningitis is an inflammation of the membranes that cover the brain and spinal cord. It can be caused by a number of infectious agents including viruses and bacteria. Haemophilus meningitis is most frequently caused by Haemophilus influenza type b, also known as Hib. 2  Before effective vaccines became available and widely used, Hib was the most frequent cause of bacterial meningitis in children 5 years of age and younger.