可乐定（clonidin）是一种α2-选择性肾上腺素能拮抗剂，主要用于治疗高血压。近几年来，该药也用来治疗儿童注意力缺乏/多动症。用于治疗儿童注意力缺乏/多动症的药物通常是兴奋剂如哌醋甲酯、右苯丙胺。但这类药物的主要不良反应是应激性、抽搐、厌食、腹痛和失眠。三环类抗 Clonidin is an alpha2-selective adrenergic antagonist and is primarily used to treat high blood pressure. In recent years, the drug has also been used to treat children with attention deficit / hyperactivity disorder. Drugs used to treat attention deficit / hyperactivity disorder in children are usually stimulants such as methylphenidate and dextroamphetamine. However, the major adverse effects of these drugs are stress, convulsions, anorexia, abdominal pain and insomnia. Tricyclic anti-class