What is Paroxetine: Uses, Warnings & Interactions

Updated Sep 3, 2025  •  Published Dec 30, 2020

Paroxetine is a commonly prescribed antidepressant. Most people know it by its brand name, Paxil. Doctors frequently use it to treat anxiety or depression, but it’s commonly used for other issues, as well. Doses are taken once per day without regard to food. It may take a month or more of daily doses for the effects to become noticeable.

Paroxetine overview

BRAND NAMES:

  • Paxil, Paxil CR, Brisdelle

Generic Names:

  • Paroxetine HCl

Uses:

  • Treats depression, anxiety disorders, obsessive-compulsive disorder (OCD), posttraumatic stress disorder (PTSD), and premenstrual dysphoric disorder (PMDD). Low-dose paroxetine capsules relieve menopause symptoms.

Therapeutic Classes:

  • Antidepressant, selective serotonin reuptake inhibitor (SSRI), central nervous system agent

Forms:

  • Tablet, extended-release tablet, capsule, oral suspension (liquid)

How it’s taken:

  • By mouth

What is Paroxetine used for?

Paxil is FDA-approved to treat major depressive disorder, generalized anxiety disorder, panic disorder, social anxiety disorder, obsessive-compulsive disorder (OCD), posttraumatic stress disorder (PTSD), and premenstrual dysphoric disorder (PMDD). Low-dose paroxetine capsules are approved to treat the vasomotor symptoms of menopause, such as hot flashes and night sweats. Doctors have several off-label uses for paroxetine, as well.

What form(s) does Paroxetine come in

  • Tablet

    • 10 mg

    • 20 mg

    • 30 mg

    • 40 mg

  • Extended-release tablet

    • 12.5 mg

    • 25 mg

    • 37.5 mg

  • Capsule

    • 7.5 mg

  • Oral suspension

    • 10 mg/5 mL

What are common Paroxetine doses?

  • For major depressive disorder: 10–50 mg taken once daily in the morning

    • Extended-release: 25–62.5 mg/day

  • For generalized anxiety disorder: 20–50 mg taken once daily in the morning

  • For social phobia: 20–60 mg taken once daily in the morning

    • Extended-release: 12.5–37.5 mg/day

  • For panic disorder: 40 mg taken once daily in the morning

    • Extended-release: 12.5–75 mg/day

  • For obsessive-compulsive disorder: 20–60 mg taken once daily in the morning

  • For PTSD: 20–50 mg taken once daily in the morning

  • For premenstrual dysphoric disorder: 12.5–25 mg extended-release tablet taken once daily in the morning

  • For vasomotor symptoms of menopause: 7.5 mg capsule taken once daily before bedtime

Find more detailed information about Paxil dosage, forms, and strengths here.

Common Paroxetine prescriptions

  • PARoxetine HCl
    250ml of 10mg/5ml bottle

  • PARoxetine HCl
    10mg tablet

  • PARoxetine HCl
    20mg tablet

  • PARoxetine HCl
    30mg tablet

  • PARoxetine HCl
    40mg tablet

How to take Paroxetine

  • Follow all the prescriber’s instructions.

    • The dose may need to be changed several times to find the most effective dose.

  • Please read the Medication Guide that comes with the medicine.

  • Take only one dose daily with or without food.

    • Doses are usually taken in the morning.

    • Paroxetine capsules are taken at night.

  • Swallow the tablet or capsule whole with a drink of water. Do not crush, break, or chew it.

  • Shake the oral suspension well before measuring a dose.

    • Use the calibrated oral syringe provided with the medicine to measure doses. Do not use kitchen measuring devices or tableware.

  • Store paroxetine in a closed container at room temperature.

    • Protect paroxetine capsules from moisture and light.

What to do if you miss a dose of Paroxetine

  • Discuss how to manage missed doses with the prescriber.

  • If it’s a morning dose, prescribers may recommend taking the missed dose if it’s remembered later in the day.

    • If it’s the next day, do not take the missed dose.

  • If it’s an evening dose, take the missed dose as soon as you remember.

    • Do not take the missed dose if it’s almost time for the next dose.

  • Take the next dose at its regular time (morning or evening).

  • Do not take extra medicine to make up for a missed dose.

Paroxetine contraindications

  • This medicine is not right for everyone. 

  • Do not use it if you have had an allergic reaction to paroxetine.

Paroxetine warnings

  • Tell any doctor or other healthcare provider who treats you that you are using this medicine.

  • Your doctor may need to perform lab tests regularly to monitor your progress and the effects of the medicine. Keep all appointments.

  • It is not safe to take this medicine during pregnancy. It could harm an unborn baby. Tell your healthcare provider right away if you become pregnant.

  • Before starting paroxetine, tell the prescriber if you are pregnant, planning to become pregnant, breastfeeding, or if you have:

    • Kidney problems

    • Liver problems

    • Heart problems

    • Bleeding problems

    • Bone problems

    • Glaucoma

    • A diagnosis of narrow angles in the eyes

    • A history of seizures or convulsions

    • Low sodium

    • Bipolar disorder

    • A history or family history of bipolar disorder, mania, hypomania, other mental health disorders, or suicide attempts.

  • For some children, teenagers, and young adults, this medicine may increase mental or emotional problems. This may lead to thoughts of suicide and violence. 

    • Talk with the prescriber right away about changes in thoughts or behavior that concern you. 

  • Paroxetine can cause serious problems, including:

    • Serotonin syndrome (a complication of taking multiple drugs like paroxetine)

    • Low sodium levels in the blood

    • Abnormal bleeding

    • Increased risk of broken bones

    • Increased risk of manic episodes in people with bipolar disorder

    • Narrow-angle glaucoma

    • Sexual dysfunction

  • This medicine may make you dizzy or drowsy. Do not drive or do anything that could be dangerous until you know how this medicine affects you.

  • Do not stop using this medicine suddenly. The prescriber will need to slowly decrease the dose before treatment can stop.

Paroxetine interactions

  • Paroxetine should never be taken with:

    • Monamine oxidase inhibitors (MAOIs): do not take paroxetine and an MAOI within 14 days of each other

    • The antipsychotic drugs pimozide and thioridazine

  • To avoid other potentially hazardous drug interactions, tell the prescribing healthcare provider about all prescription drugs, over-the-counter medications, and supplements regularly used, particularly:

    • Other antidepressants

    • Drugs that treat other mental health conditions, including anxiety, mood, psychosis, or bipolar disorder

    • Amphetamines

    • Drugs that treat irregular heart rhythms

    • Drugs that make you urinate (diuretics)

    • Drugs that slow down blood clotting (blood thinners)

    • Migraine treatments called triptans

    • NSAIDs such as aspirin, ibuprofen, or naproxen

    • Opioids

    • Desipramine, dextromethorphan, flecainide, fosamprenavir/ritonavir, metoprolol, nebivolol, perphenazine, propafenone, tamoxifen, tolterodine

    • St. John’s wort or tryptophan supplements

  • Tell other healthcare providers you are using this medicine before they prescribe new medications.

  • Avoid drinking alcohol when taking paroxetine.

Paroxetine side effects

Serious side effects

Talk to a healthcare provider if you notice any signs or symptoms of a possible serious side effect, including:

  • Suicide attempts, thoughts of hurting yourself, unusual behavior or moods, feeling more excited or energetic than usual, trouble sleeping

  • New or worsening depression

  • Greatly increased energy, racing thoughts, unusually grand ideas, pressured speech, staying awake at night, euphoric mood

  • Agitation, confusion, dizziness, racing heartbeats, rigid muscles, sweating, flushing, fever, hallucinations, coma

  • Confusion, problems concentrating, weakness, unsteadiness, headache

  • Hallucinations, fainting, coma

  • Seizures

  • Eye pain, sudden vision changes, swelling, or redness around one eye

  • Abnormal bleeding or bruising

  • Bone fracture

  • Changes in sexual function or sex drive

  • Insomnia

  • Blistering, peeling, red skin rash

  • Allergic reaction: Hives, rash, itching, swelling of the face, lips, tongue, mouth, or throat, trouble breathing, chest tightness

Less serious side effects

  • Sexual problems

  • Constipation

  • Diarrhea

  • Dry mouth

  • Trouble sleeping

  • Nervousness

  • Sweating

  • Yawning

  • Weakness

  • Loss of appetite

  • Dizziness

  • Sleepiness

  • Shaking

Find more detailed information about paroxetine side effects here.

Sources:

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