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.
Norovirus Incubation period is 24-72 hours. This is the time between catching the virus and developing symptoms. Norovirus can have a very drawn out infection period starting even before someone gets sick.(This is called the Norovirus Incubation Period) There is a very short space of time (up to two days) between the time that people acquire the virus and the time they get symptoms.This is called the Norovirus Incubation Period) There is a very short space of time (up to two days) between the time that people acquire the virus and the time they get symptoms.