Senna is an FDA-approved nonprescription drug. 1  For constipation in adults and children age 12 and over: the usual dose is 17.2 mg daily. Don't take more than 34.4 mg per day.  For constipation in children: 8.5 mg daily increased just enough to cause one bowel movement daily has been used.
Report Abuse. Norovirus lives for WEEKS on surfaces. People are contagious for 2 weeks after all symptoms are gone. People should stay home for 48 hours after all symptoms are gone as well to help prevent the spread of this hightly contagious virus.eport Abuse. Norovirus lives for WEEKS on surfaces. People are contagious for 2 weeks after all symptoms are gone. People should stay home for 48 hours after all symptoms are gone as well to help prevent the spread of this hightly contagious virus.
Although a relatively mild infection, Norovirus infection can occur at any age because even if you have it once, you are not immune. The incubation period for Norovirus is anything from 24 hours to three days, and symptoms usually last 12-60 hours.The onset is sudden, and those affected often feel very nauseous and can start vomiting.lthough a relatively mild infection, Norovirus infection can occur at any age because even if you have it once, you are not immune. The incubation period for Norovirus is anything from 24 hours to three days, and symptoms usually last 12-60 hours.