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 flu is nothing like some of the nasty gastrointestinal viruses, like the bane of all cruise ship vacationers, norovirus. âSome of those viruses can survive on an object for months and withstand cleaning with bleach,â Hay tells WebMD. âInfluenza isnât like that.â There have been studies of how long significant amounts of flu germs can survive on surfaces. Estimates range from a few minutes up to 24 hours, depending on the type of surface. (It lives longest on hard surfaces.)