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.
The noroviruses starts to multiply within small intestine once an individual get the infection. The symptoms of the infection will occur usually after 24-48 hours after the infection. And the norovirus incubation period is between the transmission of the norovirus and the early time of the symptoms appear.In the other words, we can say that the incubation period of the infection is usually about 12-hours (less or more) after exposure.he noroviruses starts to multiply within small intestine once an individual get the infection. The symptoms of the infection will occur usually after 24-48 hours after the infection. And the norovirus incubation period is between the transmission of the norovirus and the early time of the symptoms appear.