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.
1 Meningitis is usually caused by one of a number of bacteria. 2  The most common is Streptococcus pneumoniae. 3  Neisseria meningitidis can cause outbreaks in crowded conditions, such as college dormitories or military barracks.4  Haemophilus influenzae type B (Hib) can also cause meningitis in adults and children. Meningitis is usually caused by one of a number of bacteria. 2  The most common is Streptococcus pneumoniae. 3  Neisseria meningitidis can cause outbreaks in crowded conditions, such as college dormitories or military barracks.