Fluoxetine is a selective serotonin reuptake inhibitor used primarily to treat depression and anxiety disorders. It works by blocking the reabsorption of serotonin in the brain, increasing the amount of this neurotransmitter available to bind to receptors. The elevated serotonin levels help improve mood, reduce feelings of sadness, and alleviate anxiety symptoms over time. By modulating serotonin signaling, Fluoxetine also influences other downstream pathways that regulate sleep and emotional processing. The drug is absorbed in the gastrointestinal tract and reaches peak plasma concentrations within a few hours after oral administration. Its active metabolite norFluoxetine contributes to prolonged pharmacologic activity, extending the effect over several days. Overall Fluoxetine provides a sustained therapeutic benefit by maintaining higher serotonin levels in the central nervous system.

Fluoxetine is a selective serotonin reuptake inhibitor used primarily as an antidepressant medication. It is classified pharmacologically as a serotonergic agent that modulates neurotransmitter levels in the central nervous system. The drug works by blocking the reabsorption of serotonin into presynaptic nerve terminals thereby increasing the extracellular availability of this neurotransmitter. This heightened serotonin concentration enhances mood regulation and reduces symptoms of depression and anxiety disorders. Fluoxetine's long half-life and active metabolite contribute to sustained therapeutic effects over time. Inhibition of serotonin transport leads to downstream activation of serotonin receptors which alters neuronal signaling pathways involved in affect and cognition. The cumulative effect of these interactions results in improved mood stability and reduced depressive symptoms.

Fluoxetine may cause nausea especially when first taken. A mild headache can occur during the initial weeks of treatment. Some people experience difficulty sleeping or increased restlessness. Dry mouth is reported by several users. Dizziness or light headedness may appear occasionally. Sweating can increase without any clear trigger.

Nausea is a frequently reported side effect of Fluoxetine. Headache often occurs in users of this medication. Some individuals experience difficulty sleeping or feeling unusually restless. Dry mouth is also commonly noted among patients taking Fluoxetine. Feelings of heightened anxiety may appear early in treatment. Changes in sexual desire or function are frequently observed. These effects are typically mild to moderate and often lessen over time.