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What Is Paxil?

Paxil is a prescription antidepressant containing paroxetine, a selective serotonin reuptake inhibitor (SSRI). It is approved for major depressive disorder and several anxiety-related conditions in adults, including panic disorder, obsessive-compulsive disorder, and generalized anxiety disorder. Paxil affects serotonin signaling in the brain to help improve mood and reduce certain anxiety symptoms. It is available as oral tablets, while a controlled-release product called Paxil CR has separate dosing instructions. Paxil is not approved for pediatric use and requires monitoring for mood changes and other adverse effects.

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What Is Paxil?

Paxil is a prescription antidepressant containing paroxetine, a selective serotonin reuptake inhibitor (SSRI). It is approved for major depressive disorder and several anxiety-related conditions in adults, including panic disorder, obsessive-compulsive disorder, and generalized anxiety disorder. Paxil affects serotonin signaling in the brain to help improve mood and reduce certain anxiety symptoms. It is available as oral tablets, while a controlled-release product called Paxil CR has separate dosing instructions. Paxil is not approved for pediatric use and requires monitoring for mood changes and other adverse effects.

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How Does Paxil Work?

Paxil inhibits the reuptake of serotonin by nerve cells in the brain. This increases serotonin availability between neurons and changes signaling pathways involved in mood, anxiety, and emotional regulation. These effects contribute to its antidepressant and anti-anxiety activity, although its complete therapeutic mechanism is not fully established. Symptom improvement generally develops gradually over several weeks. Paxil does not provide immediate relief during a panic attack, and consistent administration is necessary to assess its therapeutic effects.

What Conditions Does Paxil Treat?

Paxil is approved for major depressive disorder, obsessive-compulsive disorder, panic disorder, social anxiety disorder, generalized anxiety disorder, and posttraumatic stress disorder in adults. Paxil CR has additional approved uses, including premenstrual dysphoric disorder, under separate prescribing instructions. A healthcare professional considers the diagnosis, symptom severity, psychiatric history, other medications, and potential interactions before selecting treatment. Paxil is not approved for children or adolescents. Patients should undergo screening for bipolar disorder before starting antidepressant therapy because treatment can trigger mania or hypomania in susceptible individuals.

How Should Paxil Be Taken?

Paxil immediate-release tablets are generally taken once daily in the morning, with or without food. Adults beginning treatment for depression commonly receive 20 mg daily, while panic disorder treatment commonly begins at 10 mg daily. Starting doses and maximum recommended doses differ by condition. Older adults and patients with severe kidney or liver impairment generally require lower starting doses. Paxil CR follows separate instructions and should not be substituted without professional guidance. Patients should take Paxil consistently and avoid stopping abruptly because discontinuation symptoms can occur.

What Are the Side Effects and Warnings of Paxil?

Common side effects include nausea, sleepiness, dizziness, sweating, dry mouth, constipation, and sexual dysfunction. Paxil carries a boxed warning for increased suicidal thoughts and behaviors in pediatric and young adult patients taking antidepressants. Serious risks include serotonin syndrome, abnormal bleeding, low blood sodium, seizures, and withdrawal symptoms after abrupt discontinuation. Paroxetine can also trigger angle-closure glaucoma in susceptible patients with untreated anatomically narrow angles. Certain medication combinations, including monoamine oxidase inhibitors, are contraindicated. New visual disturbances, worsening mood, severe agitation, or unusual bleeding require medical evaluation.

Common Questions About Paxil

Is Paxil the same as paroxetine?

Yes. Paxil is a brand name for paroxetine, a selective serotonin reuptake inhibitor used to treat depression and several anxiety-related disorders in adults.

Can Paxil treat anxiety disorders?

Yes. Paxil is approved for panic disorder, social anxiety disorder, generalized anxiety disorder, obsessive-compulsive disorder, and posttraumatic stress disorder in adults.

Can Paxil cause blurred vision or dry eyes?

Yes. Paroxetine can cause visual disturbances and may contribute to dry-eye symptoms in some patients. Sudden eye pain or significant vision changes require urgent evaluation because of the risk of angle-closure glaucoma.

Can Paxil be stopped suddenly?

No. Abrupt discontinuation can cause dizziness, irritability, sensory disturbances, sleep problems, and other withdrawal symptoms. A healthcare professional should supervise gradual dose reduction.

References

DailyMed - PAXIL (paroxetine hydrochloride) tablet, film coated. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ef3b5cbe-f9e1-c1ac-79da-cfe14e3a7e7e. Date Accessed October 30, 2026.

Paroxetine. LiverTox. https://www.ncbi.nlm.nih.gov/books/NBK548306/. Date Accessed October 30, 2026.

Paroxetine. MedlinePlus. https://medlineplus.gov/druginfo/meds/a698032.html. Date Accessed October 30, 2026.

Paroxetine. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Paroxetine. Date Accessed October 30, 2026.

Paroxetine. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK526022/. Date Accessed October 30, 2026.