Hello Murali ,
Welcome to Healthcare Magic forum.
Yes , Meftal P containing Mefenamic acid
can be given to children with high fever not responding to acetaminophen
) in prescribed doses according to age and weight of the child.
However acetaminophen is considered a safer alternative in doses 10_15 mg/kg/dose and should always be tried before giving stronger antipyretics like mefenamic acid or ibuprofen.
Also in first attack of chicken pox, nowadays an antiviral medication
containing acyclovir can be given to decrease the duration and severity of attack as per your doctors prescription.
Meanwhile the most important thing is to give the child plenty of water and a nutritious soft diet to maintain his hydration and boost his immunity.
Adequate hygiene and avoidance of scratching the lesions can prevent superadded bactetial infection and complications.
Wish him a speedy recovery.