The fuel cost of driving an electric vehicle depends on the cost of electricity per kilowatt-hour (kWh) and the energy. efficiency of the vehicle. For example, to determine the energy cost per mile of an electric vehicle, select the location on. the left axis (Electricity Cost per kWh) at 10 cents in the graph below.
Ritalin is the number one prescription drug for children with attention deficit hyperactivity disorder (ADHD). This drug has such tremendous potential for abuse that it is classified as a controlled substance by the Drug Enforcement Agency.
The ideal frequency of dosing is also determined in the first several weeks. Ritalin's effects last about three to four hours. School lasts about six hours, and most children are awake for at least twelve. Yet many children do very well all day on just one dose of Ritalin, taken before they leave home in the morning.