Strattera (atomoxetine) is used for children and adults to treat ADHD (attention deficit hyperactivity disorder). It works by increasing the amount of a specific chemical required for the person to control their behavior. You can take Strattera with some food or without, usually once a day in the morning. If your doctor told you to take this medicine twice a day you should take the doses in the morning and in the late afternoon. If you did not understand how this drug is supposed to be taken please talk to your doctor or pharmacist to learn more. You can also read medication guide to learn more about side effects and drug interactions.