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.
How long do microbes like bacteria and viruses live on surfaces in the home at normal room temperatures?Art Dekenipp Alvin, Texas The answer is probably not what you want to hear: Microbes can live on household surfaces for hundreds of years. The good news, however, is that most don't. Some well-known viruses, like HIV, live only a few seconds.