If you’ve been prescribed Cymbalta or are reading about it, you may wonder whether it’s a selective serotonin reuptake inhibitor (SSRI) like Prozac or Lexapro. It’s a common question because Cymbalta treats some of the same conditions. The short answer is no. Cymbalta belongs to a closely related but different class of antidepressants.
Understanding which class Cymbalta belongs to can help explain how it works, what it treats, and how it differs from the SSRIs many people are familiar with. This guide walks through what Cymbalta is, how it compares to SSRIs, how it is taken, and what to expect if you’re taking it.
Key Takeaways
Cymbalta is an SNRI, not an SSRI. Cymbalta is the brand name for duloxetine, which belongs to a class called serotonin-norepinephrine reuptake inhibitors (SNRIs). It has been FDA-approved since 2004.
It works on two brain chemicals. Unlike SSRIs, which mainly affect serotonin, Cymbalta can affect both serotonin and norepinephrine. This is one reason why it may also be used to treat certain chronic pain conditions.
It’s approved to treat more than depression. Cymbalta is FDA-approved to treat major depressive disorder (MDD), generalized anxiety disorder (GAD), and several chronic pain conditions. As with any antidepressant, starting, stopping, or changing doses should only be done under a healthcare provider's guidance.
What Is Cymbalta (Duloxetine)?
Cymbalta is the brand name for duloxetine, a prescription antidepressant that the FDA first approved in 2004. It is available as both a brand-name and a lower-cost generic medication and is typically taken by mouth once or twice a day.
Duloxetine belongs to a class of medications called serotonin-norepinephrine reuptake inhibitors (SNRIs). Other medications in this class include venlafaxine and desvenlafaxine. Like SSRIs, SNRIs are commonly used to treat depression and anxiety. The main difference is that SNRIs can affect both serotonin and norepinephrine, while SSRIs mainly affect serotonin.
SSRI vs. SNRI: What's the Difference?
SSRIs and SNRIs are two common types of antidepressants. While they work in similar ways and are used to treat many of the same mental health conditions, the main difference is the brain chemicals they target.
How SSRIs Work
SSRIs mainly increase the amount of serotonin available in the brain. They block its reabsorption so that more serotonin stays available between nerve cells. This can help improve symptoms of depression, improve mood and emotions, and reduce anxiety. Common SSRIs include sertraline and escitalopram.
How SNRIs Work
SNRIs like Cymbalta block the reabsorption and increase the availability of both serotonin and norepinephrine. Norepinephrine plays a role in energy, alertness, and how the body processes pain signals. Because of this, SNRIs may also help treat certain chronic pain conditions in addition to depression and anxiety.
Cymbalta isn’t the only antidepressant that’s often mistaken for an SSRI. If you’re curious about other medications, you can also read whether Wellbutrin is an SSRI and how it differs.
What Is Cymbalta Used For?
Cymbalta is approved for a wider range of conditions than most SSRIs. Its main approved uses include:
Major depressive disorder (MDD): Cymbalta is approved to treat depression in adults.
Generalized anxiety disorder (GAD): It is approved for ongoing, excessive anxiety in adults and in children ages 7 and older.
Diabetic nerve pain: It is approved to treat the nerve pain that can come with diabetes.
Fibromyalgia: It is approved to treat widespread pain and tenderness associated with fibromyalgia.
Chronic musculoskeletal pain: It is approved for certain long-term pain conditions such as chronic low back pain and osteoarthritis pain.
How Cymbalta Differs from SSRIs in Practice
Knowing that Cymbalta is an SNRI can help explain why a healthcare provider might prescribe it instead of an SSRI. While both types of medication can help treat depression and anxiety, Cymbalta has some important differences. These differences can affect how it is chosen and what you might notice.
It May Be a Better Option When Chronic Pain Is Also Present
Because Cymbalta affects norepinephrine and can influence how the body processes pain, it may help treat certain chronic pain conditions as well. For someone living with both mood symptoms and chronic pain, a healthcare provider may recommend Cymbalta over an SSRI.
To learn more about your options, you can read about the different types of depression and how treatment is matched to individual needs.
The Side Effects Overlap but Differ
Cymbalta and SSRIs share many common side effects, such as nausea, dry mouth, and sexual side effects. But Cymbalta's effect on norepinephrine can also lead to differences, such as increased sweating in some people. Your provider can help you weigh the potential benefits and side effects when choosing a medication.
How Cymbalta Is Taken
According to the FDA prescribing information for Cymbalta, it comes as a delayed-release capsule that’s usually taken once or twice a day, depending on the condition being treated. Your provider will typically start you on a lower dose before adjusting it if needed based on how you respond.
It’s recommended that you swallow the capsule whole. Do not open, crush, or chew it, as this can affect how the medication is released.
Like other antidepressants, Cymbalta can take a few weeks to reach the full effect for depression or anxiety. It’s important to take it consistently, even if you don’t notice improvement right away.
If you feel your current dose is not working as expected, talk with your healthcare provider rather than changing your dose on your own. They can help determine whether you need more time, a dose adjustment, or a different treatment approach..
A study suggests that duloxetine can reduce symptoms of GADm more than a placebo, making it one of the evidence-based treatment options. Your provider can help you decide whether it's the right choice based on your symptoms, medical history, and treatment goals.
Side Effects and Safety
Most side effects of Cymbalta are mild and tend to improve as your body adjusts to the medication, but some may require medical attention.
Common Side Effects
The most common effects may include:
Nausea
Dry mouth
Constipation
Reduced appetite
Fatigue
Drowsiness
Increased sweating
Sexual side effects
Many of these side effects improve over the first few weeks of treatment. Taking Cymbalta as prescribed and letting your healthcare provider know if side effects persist or become bothersome can help you manage them.
Important Warnings
Like other antidepressants, Cymbalta carries an FDA boxed warning about a possible increase in suicidal thoughts or behavior in people younger than 25, especially early in treatment. Although the risk is small, it’s important to contact your provider right away if you notice new or worsening mood changes or thoughts of self-harm.
It should not be taken with monoamine oxidase inhibitors (MAOIs). Combining these medications or switching between them without an appropriate waiting period (typically 14 days), can lead to serious side effects.
Combining Cymbalta with other serotonin-raising medicines can also increase the risk of a rare but serious reaction called serotonin syndrome. Before starting Cymbalta, let your healthcare provider know about all prescription medications, over-the-counter products, and supplements you take.
Do not stop taking Cymbalta suddenly. Stopping it abruptly can lead to withdrawal-like symptoms, so any change should be planned with your provider. They usually recommend gradually lowering your dose when it’s time to stop treatment.
Stopping Cymbalta Safely
Cymbalta isn’t considered addictive, but the body does adjust to it over time. That means stopping it suddenly may lead to discontinuation or withdrawal-like symptoms.
These symptoms can include dizziness, nausea, headache, irritability, and sensations that feel like brief electrical jolts or ‘brain zaps’. To help reduce the risk, providers usually taper the dose down gradually rather than stopping all at once.
If you’re thinking about stopping Cymbalta, talk to your provider first. They can create a tapering plan based on your dose, how long you've been taking the medication, and your symptoms.
It is also worth remembering that improvement can take time when starting or changing any antidepressant. If you're considering stopping Cymbalta because it doesn't seem to be working yet, let your healthcare provider know.
Finding the right antidepressant can take time, and what works well for one person may not be the best choice for another.
If you have questions about Cymbalta or your current treatment, a psychiatric provider can help you make informed decisions based on your symptoms and goals. With Blossom Health, you can connect with a board-certified psychiatric provider online, with care covered by many in-network insurance plans.
Medical Disclaimer
This article is for educational purposes only and does not constitute medical advice. The information provided should not replace consultation with a qualified healthcare provider. Individual responses to medications can vary significantly, and what applies to one person may not be the same for another.
Always consult with your doctor or pharmacist before making any decisions about medication changes, discontinuation, or interactions with other substances. If you’re experiencing concerning symptoms or side effects, please seek professional help from a healthcare provider.
In case of a medical emergency, contact your local emergency services immediately or call 911. For mental health emergencies, contact the National Suicide Prevention Lifeline at 988.
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