The typical dose for amphetamines in the treatment of narcolepsy in adults ranges from 5 mg to 60 mg per day. These daily doses are usually divided into at least two small doses taken during the day. Doses usually start on the low end of the range and are increased until the desired effects occur. Children over the age of 12 years with narcolepsy receive 10 mg per day initially. Children between the ages of six and 12 years start with 5 mg per day. The typical dose for adults with obesity ranges from 5 mg to 30 mg per day given in divided doses. The medication is usually given about one-half hour to one hour before meals.
The typical starting dose of amphetamines given to children with attention-deficit disorder over the age of six years is 5 mg per day. This is increased by 5 mg per day over a period of time until the desired effect is achieved. Children under the age of six years with this condition are usually started at 2.5 mg per day.
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