Atomoxetine should be called Tomoxetine Hydrochloride, is a psychotropic drug used in the treatment of attention deficit hyperactivity disorder in children and adolescents. 1.Function: The main component in atomoxetine hydrochloride is a highly selective and potent presynaptic norepinephrine transporter inhibitor with no direct effect on serotonin or dopamine transporters. 2. Main Treatment: Used in the treatment of attention deficit hyperactivity disorder in children and adolescents. 3. Side effects: May cause severe liver damage, skin itching, jaundice, dark urine, right upper abdominal pressure and flu-like symptoms. 4. Precautions: Do not use with monoamine oxidase inhibitors. The safety and efficacy of this medication in children and elderly patients are not known, and the medication needs to be used with caution, and should be used with caution in patients with urinary retention or renal dysfunction. The drug should be taken under the guidance of a medical professional to avoid blind self-medication.