Prozac, known generically as fluoxetine, is an oral antidepressant medication that is primarily used for conditions such as depression, obsessive-compulsive disorder, and bulimia nervosa. It is a selective 5-hydroxytryptamine reuptake inhibitor and is often used clinically to treat depression. In addition to treating depression, it is also used to treat major depressive disorder, premenstrual irritability disorder, obsessive-compulsive disorder, panic disorder, social anxiety disorder, post-traumatic stress disorder, bulimia nervosa, and many other psychiatric disorders. The effect of fluoxetine is more significant in patients with bulimia nervosa, which may be related to the adverse reaction of fluoxetine after taking, the adverse reaction of the gastrointestinal tract after fluoxetine will be more obvious, which usually leads to the patient’s symptoms such as loss of appetite, nausea, vomiting, diarrhea, constipation, dry mouth, etc., and it can effectively suppress the appetite. It is recommended to go to the hospital in time to receive professional treatment if any related psychological disorder occurs. The medication should be taken under the guidance of a professional doctor, and is prohibited for patients who are allergic to fluoxetine or its excipient components.