Paroxetine hydrochloride tablets work to treat various types of depression. The drug is a potent, highly selective 5-HT reuptake inhibitor. Its mechanism of action is to increase the concentration of 5-HT in the synaptic gap and enhance central 5-hydroxytryptaminergic nerve function. So clinically the drug is not only used for the treatment of depression, obsessive-compulsive disorder, panic disorder with or without square terror, social phobia, social anxiety disorder; it is also used for preventive treatment to prevent recurrence of depression, obsessive-compulsive disorder and panic disorder. Adverse reactions such as headache, drowsiness, blurred vision, nausea, diarrhea, and constipation have been observed after use. It is contraindicated in people who are allergic to any of the ingredients in this product; this product should not be combined with methythiopyridazine and perphenazine. All patients treated with antidepressants should be closely observed and monitored for worsening clinical symptoms, behavior, and abnormal changes in behavior. If medication is needed, it should be used under the guidance of a specialist, and should not be used on its own to avoid adverse reactions.