“The Happy Pill”: 5 Things to Know About Prozac

Mental health concerns can make every area of your life a challenge. When you suffer from major depression, just getting out of bed may seem impossible. Many people look to medications like Prozac, often called the “happy pill,” to provide a quick fix. However, depression treatment is more complicated than simply taking a pill. Your doctor or mental health professional may recommend a combined approach using medication such as fluoxetine and therapy to help alleviate the worst symptoms of depression and give you tools for better managing your mental health in the future.

At Levelheaded Mind, we believe patients deserve the most effective treatment and the proper education to make decisions about their mental health treatment. If your doctor prescribes fluoxetine, otherwise known as Prozac, to treat depression or other mental health issues, you probably have some questions about the medication. This Prozac review gives you the information you need to know about Prozac to make educated decisions, including its history, what conditions it treats, how long it takes to work, it’s  side effects, and drug interactions you may experience.

What is Prozac (fluoxetine)?

The first generation of antidepressant medications, known as MAOIs, were effective but had many side effects that made doctors hesitant to prescribe them. That meant that many people with depression went without treatment. Fluoxetine (Prozac) entered the scene in 1987 and revolutionized mental health treatment.

Prozac is an SSRI, or selective serotonin reuptake inhibitor, that increases serotonin levels in the brain. Prozac can also increase norepinephrine and dopamine. Serotonin can positively influence mood, emotion, and sleep, while norepinephrine and dopamine work to reduce fatigue. Fluoxetine can also combat depression by reducing inflammation, which can make depression worse. It’s generally well tolerated by most people, and any side effects typically resolve within a few days or weeks of starting treatment. Since it’s been around for nearly 40 years, Prozac is well-studied and has a long history of use, so we know it’s effective for treating depression. Other SSRI medications include citalopram (Celexa) and sertraline (Zoloft). 

What is fluoxetine used for? 

Like many medications, fluoxetine has many FDA-approved uses for mental illness and a few off-label uses. 

Prozac is FDA-approved to treat:

  • Major depressive disorder, especially symptoms of lethargy, fatigue, tiredness, blunted affect, and lack of motivation.

  • Obsessive-compulsive disorder (OCD) in adults, adolescents, and children.

  • Panic disorder - a condition characterized by frequent panic attacks in people with and without agoraphobia, a fear of being in spaces where one cannot easily escape.

  • Bulimia nervosa - a condition involving cycles of binging and purging large amounts of food.

  • Premenstrual dysphoric disorder (PMDD) - a form of pre-menstrual syndrome involving severe emotional and physical symptoms.

  • Bipolar disorder and treatment-resistant depression, when combined with
    antipsychotic medications.

Off-label uses of Prozac include the following:

  • Social anxiety

  • Post-traumatic stress disorder (PTSD)

  • Binge eating disorder

  • Reducing the severity of Covid-19 symptoms

How long does it take to work?

One of the benefits of Prozac is that it takes less time to work than many other medications. Typically, patients start seeing improvement in depressive symptoms after 2-4 weeks of consistent use. However, some patients may have to wait up to six weeks. 

If you aren’t seeing improvement in symptoms of severe depression, such as lethargy, fatigue, and irritability, within eight weeks, you may need to talk to your doctor. They may recommend a higher dose, a different medication, or adding a medication that boosts the effects of fluoxetine. You’ll need to stay on Prozac for at least six months to experience the full benefit of treatment for your depression.

Is fluoxetine addictive?

Antidepressant medications are not addicting. They won’t cause you to crave more of them to get the same effect. That said, your brain and body will get used to the increased serotonin, so you shouldn’t stop taking the medication without talking to your doctor.

Stopping an SSRI medication abruptly can cause serotonin abstinence syndrome or withdrawal symptoms. Prozac, though, has a long half-life, and since it stays in your system for a long time, even if you don’t take it, it’s less likely to cause withdrawal symptoms than other medications.

Drug interactions and side effects:

One downside about Prozac staying in your system for so long is you have to be careful about adding other medications or switching antidepressants. If you’re adding new drugs, you’ll want to do so slowly, and if your doctor changes you from Prozac to a monoamine oxidase inhibitor (MAOI) medication, you’ll need to wait about five weeks after stopping fluoxetine.

Prozac has many drug interactions, so your doctor may not prescribe it if you take a lot of other medications. The list of medicines it interacts poorly with is too long to include here, but the most common ones include beta-blockers, cholesterol-lowering meds (or statins), Trazodone, and buspirone. Prozac slows the process of metabolizing these medications so that you can end up with toxic levels in your system. Be sure to discuss possible interactions with your healthcare provider.

Every medication has side effects, even Tylenol. Prozac is no different. Some side effects are mild or short-lived, and others can be more severe. The experience of side effects is entirely different from person to person, so just because one person doesn't tolerate Prozac well doesn’t mean everyone will have the same experience. The side effects of Prozac include the following:

  • anxiety

  • insomnia

  • irritability

  • dry mouth

  • headaches

  • drowsiness (drinking alcohol can intensify this effect, so it’s best to avoid alcohol while taking Prozac)

  • dizziness

  • sweating

  • decreased appetite, which can contribute to weight loss

  • nausea

  • diarrhea

  • decreased sexual arousal or libido

Most side effects lessen or disappear after a week or so of adjusting to the medication. Taking the medication with food can reduce or eliminate digestive side effects.

When considering sexual side effects, it’s vital to mention that while it occurs in about 50% of people, other medications or treatments can help. It’s also important to note that loss of libido or low sexual arousal is a symptom that depression has returned, so you should mention it to your doctor.

Remember, everyone responds differently to medications. Many people have no side effects, and many have just a few. Even if you initially experience mild side effects, improving your mental health is worth it. If you experience bothersome side effects while taking Prozac, call your doctor; don’t just stop the medication.

Seek support managing your mental health needs

At Levelheaded Mind, we believe patient education is one of the most critical factors affecting mental health care. We take a holistic approach and put you in charge of your mental health treatment. You can find additional mental health advice from our psychiatric nurse practitioner, Jezel Rosa, on our YouTube channel. If you are facing mental health challenges and are looking for 1:1 guidance, consider scheduling an initial mental health coaching session so we can help you move forward on your mental health care journey.

 Disclaimer: All the information on this channel is for educational purposes and not intended to be specific/personal medical advice or a substitute for the diagnosis and treatment of any conditions discussed herein. Furthermore, watching these videos or getting answers to comments/questions does not establish a provider-patient relationship. Please consult with your healthcare provider for proper diagnosis and treatment.

References

Creeden, J. F., Imami, A. S., Eby, H. M., Gillman, C., Becker, K. N., Reigle, J., Andari, E., Pan, Z. K., O'Donovan, S. M., McCullumsmith, R. E., & McCullumsmith, C. B. (2021). Fluoxetine as an anti-inflammatory therapy in SARS-CoV-2 infection. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapies, 138, 111437. https://doi.org/10.1016/j.biopha.2021...

Herzog, D. P., Wagner, S., Ruckes, C., Tadic, A., Roll, S. C., Härter, M., & Lieb, K. (2017). Guideline adherence of antidepressant treatment in outpatients with major depressive disorder: a naturalistic study. European archives of psychiatry and clinical neuroscience, 267(8), 711–721. https://doi.org/10.1007/s00406-017-07...

Sohel AJ, Shutter MC, Molla M. Fluoxetine. [Updated 2021 Jul 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NB.

Stahl, S. M., Grady, M. M., & Muntner, N. (2021). Stahl's essential psychopharmacology: Neuroscientific basis and practical applications. Cambridge University Press.

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