Rivastigmine (sold under the trade name Exelon) is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease.
Quick Answer. According to the University of Washington, cows sleep for approximately 3.9 hours per day, meaning that they spend about 16.9 percent of the day sleeping. Adult humans sleep for approximately 8 hours per day, which represents 33.3 percent of the day. Human infants sleep approximately 16 hours per day.
Scientists and pet experts arenât sure why dogs doze so much, but itâs typically how they spend at least half of their day. One theory: Unlike humans who generally stay up all day and then sleep for one long stretch at night, spending as much as 25 percent of their sleep in Rapid Eye Movement (REM) Click to learn more sleep, dogsâ shorter sleep stints mean just about 10 percent of their snoozing is REM.