Fluoxetine service generally with 2-10 weeks can see the effect, individual patients due to drug sensitivity, drug compliance and other factors affect the difference. Fluoxetine is a selective 5-hydroxytryptamine reuptake inhibitor, the acute treatment of depression, the consolidation period to prevent relapse and maintenance period to prevent relapse efficacy is clear, but also for the treatment of obsessive-compulsive disorder, bulimia nervosa and so on. Fluoxetine is generally used for 2-10 weeks to see the effect, should start with a small dose, after 2 weeks of treatment if there is no obvious efficacy, you can gradually increase the dose, according to the patient’s condition assessment to achieve the appropriate dose. If there is no improvement after 10 weeks of administration, the treatment of fluoxetine must be reconsidered. Adverse reactions such as allergy, chills and nausea may occur with the use of fluoxetine, which is contraindicated in case of allergy to the ingredients and used with caution in epilepsy. Do not stop the drug abruptly. Fluoxetine is a prescription drug and should be used as directed by a physician.