10 mg Dexedrine (3513 10 mg SB 10 mg brown capsule) is a stimulant medication that doctors prescribe to treat Narcolepsy and Attention deficit hyperactivity disorder. Dexedrine 10mg (Dextroamphetamine) enhances norepinephrine, serotonin, and dopamine levels and increases focus ability in a person. Dexedrine 10 mg has a risk of misuse and abuse. For this reason, it is a regulated medication.