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.
1 Life Span: 12 - 20 years. Lifestyle: Herd.  Cows spend their days in herds of around 40-50 cows, grazing on the grasslands and shrubbery. There is an old English tale which claims that cows will always sit down when its going to rain.