Mutan (Fluoxetine Hydrochloride)

Fluoxetine acts on serotonergic pathways to improve mood and anxiety‑related disorders.

• Major depressive disorder: alleviates depressive symptoms and improves overall mood in affected adults.
• Obsessive‑compulsive disorder: reduces intrusive thoughts and compulsive behaviors.
• Panic disorder: decreases frequency and severity of panic attacks.
• Bulimia nervosa: helps control binge‑eating and purging cycles.
• Premenstrual dysphoric disorder: eases mood swings and physical symptoms associated with the menstrual cycle.

• Fluoxetine inhibits the serotonin transporter (SERT) on presynaptic neurons, blocking reuptake of serotonin (5‑HT) into the nerve terminal. This increases extracellular serotonin concentrations in the central nervous system, enhancing serotonergic neurotransmission and contributing to mood stabilization and anxiety reduction.

Fluoxetine may cause a range of adverse reactions, from mild to severe.

Common Side Effects

• Nausea: mild gastrointestinal upset often occurring early in therapy.
• Headache: transient tension‑type headaches.
• Insomnia: difficulty falling or staying asleep.
• Sexual dysfunction: decreased libido, delayed orgasm, or anorgasmia.

Serious or Rare Side Effects

• Serotonin syndrome: potentially life‑threatening condition with agitation, hyperthermia, and neuromuscular abnormalities.
• Suicidal thoughts: increased risk especially in young adults during initial treatment.
• Severe allergic reaction: rash, swelling, or anaphylaxis requiring immediate medical attention.

Before starting fluoxetine, consider the following safety measures.

• Assess psychiatric history: evaluate risk of suicidal ideation, especially in younger patients.
• Review medication list: identify other serotonergic agents that could increase serotonin syndrome risk.
• Monitor hepatic function: adjust use in patients with significant liver impairment.
• Caution in pregnancy: discuss potential risks with a healthcare professional.
• Store at ambient temperature: keep in the original container, protect from moisture and light.

Fluoxetine can interact with several drug classes, requiring careful management.

Major Interactions (Avoid)

• Monoamine oxidase inhibitors (MAOIs): risk of severe serotonin syndrome.
• Thioridazine or pimozide: may cause cardiac arrhythmias.
• Linezolid: additive serotonergic effect increasing syndrome risk.

Moderate Interactions (Monitor Closely)

• NSAIDs or anticoagulants: heightened bleeding tendency.
• CYP2D6 inhibitors (e.g., quinidine): may increase fluoxetine plasma levels.
• Alcohol: can exacerbate central nervous system depression and impair judgment.