A lack of dopamine is responsible for many diseases and conditions. Sometimes dopamine does not work correctly in the brain. Sometimes the brain does not have enough dopamine. Doctors prescribe dopamine reuptake inhibitors (DRI's or DARI's) to help control symptoms. Psychostimulants and antidepressants are types of DRI's. DRI's help manage symptoms of ADHD, narcolepsy, Parkinson's Disease, obesity, substance abuse withdrawal and some mood disorders. Users can become addicted to DRI's sometimes.