skip to content

Fluoxetine 20 mg, 40 mg

(Generic Prozac®)

Fluoxetine is the generic version of Prozac. It is an FDA approved medication used to treat anxiety and depression. After an online evaluation with one of our U.S. licensed medical professionals, Fluoxetine may be the right treatment for you. Find out today.

Important safety information
  1. $25 per month (with purchase of 3-month supply)

See more price options for this medication and related treatments by clicking Start Consult.

Sorry, we’re closed for today. Our U.S. licensed medical providers are available daily 7 a.m. to 9 p.m. CST via live video visit. We look forward to serving you soon. Email us anytime at [email protected].

RedBox Rx Fluoxetine 20 mg, 40 mg Medication Bottle

Fluoxetine (Generic Prozac) FAQs

  • Fluoxetine (Prozac) is used to treat depression, obsessive-compulsive disorder (bothersome thoughts that won't go away and the need to perform certain actions over and over), some eating disorders, and panic attacks (sudden, unexpected attacks of extreme fear and worry about these attacks. Fluoxetine is in a class of medications called selective serotonin reuptake inhibitors (SSRIs). It works by increasing the amount of serotonin, a natural substance in the brain that helps maintain mental balance.

  • Fluoxetine (Prozac) comes as a capsule, a tablet, a delayed-release (releases the medication in the intestine) capsule, and a solution (liquid) to take by mouth. Fluoxetine may be taken with or without food. Fluoxetine (Sarafem) comes as a capsule to take by mouth. Fluoxetine (Prozac) capsules, tablets, and liquid are usually taken once a day in the morning or twice a day in the morning and at noon. Fluoxetine delayed-released capsules are usually taken once a week. Fluoxetine (Sarafem) is usually taken once a day, either every day of the month or on certain days of the month. Take fluoxetine at around the same time(s) every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take fluoxetine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

    Swallow the delayed-release capsules whole; do not cut, crush, or chew them.

    Your doctor may start you on a low dose of fluoxetine and gradually increase your dose.

    It may take 4 to 5 weeks or longer before you feel the full benefit of fluoxetine. Continue to take fluoxetine even if you feel well. Do not stop taking fluoxetine without talking to your doctor. If you suddenly stop taking fluoxetine, you may experience withdrawal symptoms such as mood changes, irritability, agitation, dizziness, numbness or tingling in the hands or feet, anxiety, sweating, confusion, headache, tiredness, and difficulty falling asleep or staying asleep. Your doctor will probably decrease your dose gradually.

  • RedBox Rx prescribes fluoxetine in dosages of 20 mg and 40 mg. Our U.S. licensed medical professionals can help determine the right dosing of fluoxetine, if prescribed. Start an online consult for anxiety and depression to discuss your options.

  • Fluoxetine is a selective serotonin reuptake inhibitor (SSRI) and works by increasing the levels of serotonin in the brain.

  • It can take four to five weeks to feel the full effects of fluoxetine.

  • Before taking fluoxetine,

    • tell your doctor and pharmacist if you are allergic to fluoxetine, any other medications, or any of the ingredients in fluoxetine preparations. Ask your pharmacist for a list of the ingredients.

    • tell your doctor if you are taking pimozide (Orap), thioridazine, or a monoamine oxidase (MAO) inhibitor such as isocarboxazid (Marplan), linezolid (Zyvox), methylene blue, phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate), or if you have stopped taking a monoamine oxidase inhibitor within the past 2 weeks. Your doctor will probably tell you that you should not take fluoxetine. If you stop taking fluoxetine, you should wait at least 5 weeks before you begin to take thioridazine or a monoamine oxidase inhibitor.

    • tell your doctor and pharmacist what other prescription and nonprescription medications and vitamins you are taking or plan to take. Be sure to mention any of the following: alprazolam (Xanax); amiodarone (Pacerone, Nexterone); certain antibiotics such as erythromycin (E.E.S, Eryc, Ery-tab), gatifloxacin, moxifloxacin (Avelox), and sparfloxacin (no longer available in U.S., Zagam); amphetamines such as amphetamine (in Adderall), dextroamphetamine (Dexedrine, Dextrostat, in Adderall), and methamphetamine (Desoxyn); anticoagulants ('blood thinners') such as warfarin (Coumadin, Jantoven); antidepressants (mood elevators) such as amitriptyline (Elavil), amoxapine, clomipramine (Anafranil), desipramine (Norpramin), doxepin, imipramine (Tofranil), nortriptyline (Pamelor), protriptyline (Vivactil), and trimipramine (Surmontil); aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen (Advil, Motrin) and naproxen (Aleve, Naprosyn); buspirone; clopidogrel (Plavix); diazepam (Valium); digoxin (Lanoxin); diuretics ('water pills'); dolasetron (Anzemet); flecainide (Tambocor); insulin or oral medications for diabetes; lithium (Lithobid); medications for anxiety and Parkinson's disease; medications for mental illness such as chlorpromazine, clozapine (Clozaril, Versacloz), droperidol (Inapsine), haloperidol (Haldol), iloperidone (Fanapt), and ziprasidone (Geodon); methadone (Methadose); medications for migraine headaches such as almotriptan (Axert), eletriptan (Relpax), frovatriptan (Frova), naratriptan (Amerge), rizatriptan (Maxalt), sumatriptan (Imitrex), and zolmitriptan (Zomig); pentamidine (Pentam); quinidine (in Nuedexta); procainamide; medications for seizures such as carbamazepine (Epitol, Tegretol, Teril) and phenytoin (Dilantin, Phenytek); sedatives; sleeping pills; other selective serotonin-reuptake inhibitors such as citalopram (Celexa), fluoxetine (Prozac, Sarafem, Selfemra), or fluvoxamine (Luvox); serotonin–norepinephrine reuptake inhibitors (SNRI) medications desvenlafaxine (Khedezla, Pristiq), duloxetine (Cymbalta), levomilnacipran (Fetzima), and venlafaxine; sotalol (Betapace, Sorine); tranquilizers; and vinblastine (Velban). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

    • tell your doctor what nutritional supplements and herbal products you are taking, especially products that contain St. John's wort or tryptophan.

    • tell your doctor if you or anyone in your family has or has ever had a prolonged QT interval (a rare heart problem that may cause irregular heartbeat, fainting, or sudden death). Also tell your doctor if you have a low level of potassium or magnesium in your blood or are being treated with electroshock therapy (procedure in which small electric shocks are administered to the brain to treat certain mental illnesses). Tell your doctor if you have recently had a heart attack and if you have or have ever had heart failure, diabetes, seizures, or liver or heart disease.

    • tell your doctor if you are pregnant, especially if you are in the last few months of your pregnancy, or if you plan to become pregnant or are breastfeeding. If you become pregnant while taking fluoxetine, call your doctor. Fluoxetine may cause problems in newborns following delivery if it is taken during the last months of pregnancy.

    • you should know that fluoxetine may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.

    • remember that alcohol can add to the drowsiness caused by this medication.

    • you should know that fluoxetine may cause angle-closure glaucoma (a condition where the fluid is suddenly blocked and unable to flow out of the eye causing a quick, severe increase in eye pressure which may lead to a loss of vision). Talk to your doctor about having an eye examination before you start taking this medication. If you have nausea, eye pain, changes in vision, such as seeing colored rings around lights, and swelling or redness in or around the eye, call your doctor or get emergency medical treatment right away.

  • Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

  • Fluoxetine can stay in your system for up to 25 days after stopping the medication. Some users may experience withdrawal symptoms immediately upon stopping fluoxetine while others may take up to 15 days to experience withdrawal. Please consult your medical provider for advice on how to safely taper off fluoxetine.

  • Fluoxetine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

    • nervousness

    • anxiety

    • difficulty falling asleep or staying asleep

    • nausea

    • diarrhea

    • dry mouth

    • heartburn

    • yawning

    • weakness

    • uncontrollable shaking of a part of the body

    • loss of appetite

    • weight loss

    • changes in sex drive or ability

    • excessive sweating

    • headache, confusion, weakness, difficulty concentrating, or memory problems

    Some side effects can be serious. If you experience any of the following symptoms or those listed in the IMPORTANT WARNING or SPECIAL PRECAUTIONS section, call your doctor immediately:

    • rash

    • hives or blisters

    • itching

    • fever

    • joint pain

    • swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs

    • difficulty breathing or swallowing

    • agitation, fever, sweating, confusion, fast or irregular heartbeat, shivering, severe muscle stiffness or twitching, hallucinations, loss of coordination, nausea, vomiting, or diarrhea

    • fast, slow, or irregular heartbeat

    • shortness of breath

    • dizziness or fainting

    • seizures

    • abnormal bleeding or bruising

    Fluoxetine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

    If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

  • Fluoxetine has been linked to an increased risk of birth defects in several studies. Consult with your medical provider for the best options if you are pregnant or plan on becoming pregnant.

  • Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from light, excess heat, and moisture (not in the bathroom).

    It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location - one that is up and away and out of their sight and reach. http://www.upandaway.org

    Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website (http://goo.gl/c4Rm4p) for more information if you do not have access to a take-back program.

  • In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

    Symptoms of overdose may include the following:

    • unsteadiness

    • confusion

    • unresponsiveness

    • nervousness

    • uncontrollable shaking of a part of the body

    • dizziness

    • rapid, irregular, or pounding heartbeat

    • seeing things or hearing voices that do not exist (hallucinating)

    • fever

    • fainting

    • coma (loss of consciousness for a period of time)

  • Keep all appointments with your doctor.

    Before having any laboratory test (especially those that involve methylene blue), tell your doctor and the laboratory personnel that you are taking fluoxetine.

    Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

    It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

    • Prozac®

    • Prozac® Weekly

    • Rapiflux®

    • Sarafem®

    • Selfemra®

  • Fluoxetine is a generic version of Prozac®.

  • Fluoxetine is $25 per month with RedBox Rx, no insurance required and no membership fees. We’re able to offer low prices because we purchase fluoxetine directly from manufacturers and ship from our pharmacy in Iowa.

  • Fluoxetine requires a prescription. Start an online consult for anxiety and depression with a U.S. licensed medical professional at RedBox Rx to see if fluoxetine is right for you.

  • A small number of young adults (up to 24 years of age) who took antidepressants ('mood elevators') such as fluoxetine during clinical studies became suicidal (thinking about harming or killing oneself or planning or trying to do so). Young adults who take antidepressants to treat depression or other mental illnesses may be more likely to become suicidal than young adults who do not take antidepressants to treat these conditions. However, experts are not sure about how great this risk is and how much it should be considered in deciding whether to take an antidepressant.

    You should know that your mental health may change in unexpected ways when you take fluoxetine or other antidepressants even if you are an adult over 24 years of age. You may become suicidal, especially at the beginning of your treatment and any time that your dose is increased or decreased. You, your family, or your caregiver should call your doctor right away if you experience any of the following symptoms: new or worsening depression; thinking about harming or killing yourself, or planning or trying to do so; extreme worry; agitation; panic attacks; difficulty falling asleep or staying asleep; aggressive behavior; irritability; acting without thinking; severe restlessness; and frenzied abnormal excitement. Be sure that your family or caregiver knows which symptoms may be serious so they can call the doctor if you are unable to seek treatment on your own.

    Your healthcare provider will want to see you often while you are taking fluoxetine, especially at the beginning of your treatment. Be sure to keep all appointments for office visits with your doctor.

    The doctor or pharmacist will give you the manufacturer's patient information sheet (Medication Guide) when you begin treatment with fluoxetine. Read the information carefully and ask your doctor or pharmacist if you have any questions. You also can obtain the Medication Guide from the FDA website: http://www.fda.gov/Drugs/DrugSafety/ucm085729.htm.

    No matter your age, before you take an antidepressant, you, your parent, or your caregiver should talk to your doctor about the risks and benefits of treating your condition with an antidepressant or with other treatments. You should also talk about the risks and benefits of not treating your condition. You should know that having depression or another mental illness greatly increases the risk that you will become suicidal. This risk is higher if you or anyone in your family has or has ever had bipolar disorder (mood that changes from depressed to abnormally excited) or mania (frenzied, abnormally excited mood) or has thought about or attempted suicide. Talk to your doctor about your condition, symptoms, and personal and family medical history. You and your doctor will decide what type of treatment is right for you.

A woman closing her eyes enjoying coffee, feeling focused and peaceful

Affordable anxiety and depression treatment online.

Your mental health is important. If you’ve been feeling irritable, distracted, or overwhelmed lately, you’re not alone. We provide ongoing mental health support and prescription medication on your schedule.

  • No membership or subscription fees.
  • Low-cost $25 telehealth consult with a licensed medical provider.
  • Medications for $25 per month (with purchase of 3-month supply)
  • Confidential, private and secure.
  • Free standard shipping or expedited/overnight available.

Sorry, we’re closed for today. Our U.S. licensed medical providers are available daily 7 a.m. to 9 p.m. CST via live video visit. We look forward to serving you soon. Email us anytime at [email protected].

How RedBox Rx Works

  • Select the condition you would like to treat.

    Choose either a specific treatment or condition. Then fill out a quick questionnaire about your health history.

  • Get your personalized treatment plan.

    After a review by a U.S. licensed medical provider, you will receive recommended treatment options so you can complete the prescription order for your medication.

  • Prescriptions delivered right to your door.

    If your provider prescribes treatment, we will ship it to you for free in discreet packaging from our U.S. licensed pharmacy.

RedBox Rx Medication Bottle

Get fluoxetine prescribed online.

Take a 5-minute assessment, then schedule a 20-minute video consultation with one of our experienced, licensed medical providers to determine whether fluoxetine is right for you.

Sorry, we’re closed for today. Our U.S. licensed medical providers are available daily 7 a.m. to 9 p.m. CST via live video visit. We look forward to serving you soon. Email us anytime at [email protected].

From the RedBox Rx Blog

Mental Health

Adult-Onset ADHD: What to Know

Oct 17, 2023 | 3 Min Read

Research is expanding to better diagnose adult-onset ADHD, as a condition that newly develops in adulthood. For those with adult ADHD diagnosis, only around one-fourth are currently getting treatment. Learn more about the symptoms, research and treatment options for adult-onset ADHD.
Mental Health

How to Find an Adult ADHD Doctor

Apr 02, 2024 | 2 Min Read

Seeking an adult ADHD psychiatrist or clinic nearby? From evaluating qualifications and experience to exploring treatment approaches and compatibility, we provide valuable insights to guide your decision-making process. Trust us to assist you in finding the ideal professional to effectively manage adult ADHD.
Mental Health

Panic Attack vs. Anxiety Attack: What’s the Difference?

Feb 22, 2024 | 4 Min Read

Understanding the subtle differences between panic attacks and anxiety attacks is crucial, as both are anxiety disorders affecting millions worldwide, and proper identification facilitates effective treatment and management.

RedBox Rx is here when you need us with out-of-the-box personalized care.

Our story