Can we use serratiopeptase in children? .If not what is the alternative

I wouldn't use it. Though serrapeptase may be at least theoretically beneficial as a mucolytic & an antibiotic facilitator, it's effectiveness still being tested. Standardized preparations & consistent quality & effectiveness are big issues. Also I'm not sure about safety in small children & infants. Nasal saline works well. Need more info from you regarding child's age, upper vs lower airways, illnesses (asthma?)