SSRIs are the most commonly prescribed antidepressants for depression, capturing 55.8% of the global market share in 2024. If your doctor prescribes an SSRI, you’ll most likely receive sertraline or escitalopram, the two highest-volume options across clinical settings. Both demonstrate superior tolerability with fewer discontinuations than alternatives. Sertraline holds FDA approval across six indications, while escitalopram shows slightly higher remission rates in meta-analyses. Below, you’ll find how these compare to SNRIs, older antidepressants, and emerging therapies.
Why SSRIs Are the Most Prescribed Antidepressants
When clinicians reach for a first-line pharmacotherapy in major depressive disorder, they overwhelmingly choose selective serotonin reuptake inhibitors, and the data confirm why. SSRIs captured 55.8% of the global antidepressant market share in 2024, reflecting decades of clinical validation and broad formulary inclusion. Their safer adverse-effect profile compared to tricyclics and MAOIs makes them suitable for long-term management across diverse populations.
Primary care prescribing trends reinforce this dominance. You’ll find that physician familiarity, accumulated over decades, sustains SSRI prevalence even as newer agents enter the pipeline. Hospital pharmacies, holding 40.12% of distribution revenue, facilitate initial prescriptions, while expanding online pharmacy channels and tele-psychiatry platforms drive refill accessibility. The availability of generic antidepressants further supports widespread adoption, as patent expirations have made SSRIs accessible at lower cost thresholds for patients and healthcare systems alike. The broader antidepressant market, valued at USD 22.13 billion in 2025, is projected to reach USD 32.25 billion by 2031, underscoring the accelerating demand for these therapies worldwide. In the United States alone, the anti-depressant drugs market was estimated at USD 7.46 billion in 2024 and is expected to reach USD 11.28 billion by 2035, growing at a CAGR of around 3.83%. Together, these factors position SSRIs as the cornerstone of contemporary antidepressant therapy.
Medications Most Commonly Prescribed for Depression
The most common categories of medications used to treat clinical depression as well as anxiety are SSRIs and SNRIs.
The SSRIs, or Selective Serotonin Reuptake Inhibitors, work to increase the amount of serotonin in the brain. Serotonin works as a neurotransmitter, but you can think of it as a chemical messenger. These messengers carry information between the neurons or brain cells. When the level of serotonin in the brain is low, you may develop depression, anxiety, or both. These simple medications are often used successfully to treat MDD or GAD.
SNRIs work in much the same way. However, while SSRIs work to impact only one neurotransmitter, SNRIs impact two different neurotransmitters. It’s important to keep in mind that SNRIs are often prescribed when a person is experiencing issues with both depression and anxiety.
Sertraline and Escitalopram: The Top Two by Volume
Although both sertraline and escitalopram dominate SSRI prescribing volumes, they’ve earned that position through distinct clinical profiles. Sertraline holds FDA approval across six indications, MDD, OCD, panic disorder, PTSD, social anxiety disorder, and PMDD, making it one of the most versatile commonly used depression meds available. Escitalopram carries approvals for MDD and GAD, with documented allosteric properties that may enhance its serotonin reuptake inhibition.
In meta-analyses encompassing 2,687 patients, escitalopram demonstrates slightly higher response and remission rates versus comparators, though head-to-head trials show no significant efficacy difference for MDD. Both belong to the most commonly prescribed antidepressant class and exhibit superior tolerability with fewer discontinuations than alternatives. Their complementary strengths explain why they consistently lead SSRI prescribing across clinical settings.
Selective Serotonin Reuptake Inhibitors
SSRIs that the Food and Drug Administration (FDA) has approved to treat depression include the following:
- Citalopram (Celexa)
- Escitalopram (Lexapro)
- Fluoxetine (Prozac)
- Paroxetine (Paxil, Pexeva)
- Sertraline (Zoloft)
SNRIs vs. SSRIs: Which Type Works Better?
When SSRIs don’t fully resolve your symptoms, SNRIs offer a dual-mechanism alternative that targets both serotonin and norepinephrine reuptake, yielding modestly higher remission rates. However, this statistical advantage doesn’t always translate into clinical significance, and SNRIs can carry a higher risk of certain side effects and treatment discontinuation due to adverse reactions. Symptom profile, tolerability, and treatment history all play a role in determining whether an SSRI or SNRI may be a better fit.
Efficacy and Side Effects
Several head-to-head analyses suggest SNRIs hold a measurable edge over SSRIs in achieving depression remission. Beyond mood, SNRIs may also show superior efficacy for painful physical symptoms accompanying depression because of their dual serotonin-norepinephrine action. SSRIs, however, remain highly effective for anxiety, irritability, and general emotional distress.
Tolerability differs meaningfully between individuals. Some people respond better to one class than the other, which is why medication selection often involves some degree of trial and error under medical supervision.
Choosing the Right Class
SSRIs block serotonin reuptake exclusively, improving mood and reducing anxiety. SNRIs additionally inhibit norepinephrine reuptake, which may help improve alertness, motivation, and certain physical symptoms associated with depression. If anxiety predominates, SSRIs are often a starting point. If fatigue, pain, or more severe depressive symptoms are prominent, SNRIs may offer broader benefit. Both classes remain first-line options, and the best choice depends on the individual’s needs.
Serotonin and Norepinephrine Reuptake Inhibitors
These SNRIs are approved by the FDA as antidepressants:
- Desvenlafaxine (Pristiq)
- Duloxetine (Cymbalta), also approved to treat anxiety and certain types of chronic pain
- Levomilnacipran (Fetzima)
- Venlafaxine (Effexor XR), also approved to treat certain anxiety disorders and panic disorder
Other Antidepressants
Tricyclic and Tetracyclic Antidepressants
Some clients find that SSRIs and SNRIs don’t work as well for them. Some psychiatrists may prescribe Tricyclic or tetracyclic antidepressants. Some of the earliest drugs approved to treat depression, they are not commonly prescribed today because they have more side effects than SSRIs and SNRIs. However, they may be used for clients whose condition did not approve with these medications.
Amitriptyline (brand name Elavil) is a commonly prescribed tricyclic antidepressant, and mirtazapine (brand name Remeron) is a common tetracyclic one.
TCAs and MAOIs: Why Older Antidepressants Still Get Prescribed
Though SSRIs dominate first-line prescribing, tricyclic antidepressants and monoamine oxidase inhibitors still retain value in certain clinical settings. TCAs may be especially helpful in biological melancholic depression or when chronic pain overlaps with depression. MAOIs remain an evidence-supported later-line option for some individuals with treatment-resistant depression.
When TCAs Are Preferred
Dual-action TCAs like amitriptyline and clomipramine may offer benefits when depression presents with painful physical symptoms or when SSRIs have not been effective enough. Although these medications are associated with higher rates of side effects, they may still be appropriate when benefits outweigh the drawbacks.
MAOIs As Last Resort
MAOIs affect serotonin, norepinephrine, and dopamine by preventing their breakdown. Their broader mechanism helps explain why they can still be effective for some cases of treatment-resistant depression. Because of dietary tyramine restrictions and serious drug interaction risks, however, they are generally reserved for later-line use.
Managing Broader Side Effects
Both TCAs and MAOIs can cause more burdensome side effects than newer antidepressants. Dry mouth, constipation, blurred vision, drowsiness, orthostatic hypotension, nausea, and sexual dysfunction are some of the better-known concerns. Even so, careful prescribing and side-effect management can make these medications useful options for select patients.
MAOIs
Monoamine oxidase inhibitors (MAOIs) were the first antidepressants developed. They work much like SSRIs and SNRIs in that they affect the chemical makeup of the brain. MAOIs can be used to treat panic disorders, social phobias, and depression with atypical features.
Caution is advised when using MAOIS because of potentially harmful drug-to-drug and drug-to-food interactions.
Bupropion
Bupropion may be prescribed as a generic medication. Many will recognize the name Wellbutrin, a common brand name for the medicine. Bupropion has been utilized to treat various conditions including depression. Bupropion has also been approved to help people stop smoking.
NMDA Receptor Antagonists
These medications have been used in the past to treat Alzheimer’s disease, but they’ve also been approved to treat various types of mood disorders. While doctors do not completely understand the neurobiological mechanisms involved, studies have shown NDMA receptor antagonists, especially ketamine, to deliver rapid results for people with treatment-resistant depression.
Noradrenaline and Specific Serotonergic Antidepressants (NaSSAs)
NaSSAs may be effective for some people who are unable to take SSRIs. They have side effects like those of SSRIs but are thought to cause fewer sexual issues. They may cause more drowsiness at first. Mirtazapine (Remeron) is an example of a commonly prescribed NaSSA.
Deplin
Deplin (L-methylfolate), composed of synthetic folic acid, a form of vitamin B, is a food medicine or nutraceutical that can help to treat depression. It may be used along with an antidepressant drug in order to treat the condition. Available by prescription only, Deplin is specifically intended to meet a depressed individual’s nutritional needs.
Which Antidepressant Is Safest for Children and Teens?
Among all antidepressant classes, selective serotonin reuptake inhibitors (SSRIs) carry the strongest safety and efficacy data for treating depression in children and adolescents. Fluoxetine remains the most extensively studied option, holding FDA approval for depression in children aged eight and older.
- Fluoxetine is the first-line SSRI, demonstrating superiority over placebo across multiple systematic reviews
- Escitalopram holds FDA approval for adolescents 12 and older with strong supporting evidence
- Sertraline shows modest efficacy and is commonly prescribed after fluoxetine
- Paroxetine carries less favorable risk profiles, including heightened suicidality concerns
- Venlafaxine should be avoided due to increased suicidal ideation risk
Careful dose titration and consistent monitoring are essential, as all antidepressants require suicidality surveillance in youth.
New Antidepressants to Watch in 2026
The antidepressant landscape is shifting rapidly, with several newly approved medications and late-stage pipeline candidates offering mechanisms that extend well beyond traditional serotonin and norepinephrine reuptake inhibition. Exxua (gepirone), the first oral selective 5-HT1A receptor agonist, gained FDA approval in September 2023. Zuranolone (Zurzuvae) modulates neurosteroids and is used for postpartum depression. Spravato (esketamine) has also expanded treatment possibilities for people with treatment-resistant depression through NMDA receptor antagonism.
In the pipeline, agents such as aticaprant, NRX-101, and cariprazine continue to draw clinical interest as researchers pursue faster-acting and mechanistically novel depression treatments.
How Do You and Your Physician Determine What Medication Is Right for You?
Ultimately, you and your healthcare provider must determine the correct medication to treat your symptoms. You may experience some trial and error in finding the right medication to treat the condition. It’s important to keep in mind that most individuals must take the medication for at least four weeks before seeing any type of change. It’s important to follow your doctor’s instructions, such as eating with the medication or taking it on an empty stomach. You should note any physical side effects you experience while taking the medication.
Sometimes, the only way to fully treat symptoms is to take a combination of different medications. If you have bipolar depression, your doctor may combine an antidepressant along with a mood stabilizer such as lithium in order to fully treat your symptoms.
There’s no need to give up when it comes to treating their symptoms of depression. No one individual will share the same experience as another, but people with depression need to keep all medical appointments and tell their physician about any side effects. For most clients, one full month of taking a prescribed medication is necessary to see any relief from symptoms.
It may also be beneficial to combine medications with cognitive behavioral therapy (CBT). You might decide to start CBT while working with your doctor to find the proper medications for your symptoms. Talking with a therapist during CBT sessions can help you with symptoms while you’re waiting for the medication to work.
What If You Need to Take a Combination of Medications?
It’s necessary to take all medications as prescribed. Some physicians will prescribe an antidepressant, such as those listed above, along with an antipsychotic medication such as Abilify, Rexulti, and Seroquel.
A Cambridge University study in 2018 found that treating depression with two medications, an antidepressant and an antipsychotic, resulted in better outcomes than if the client had used only one medication or a placebo.
What Are the Side Effects of Antidepressants?
The exact side effects of antidepressants depend on which medication you are taking. SSRIs and SNRIs have a certain set of commonly reported side effects, as do MAOIs and TCAs. Let’s take a look at some of the most common side effects you may encounter when first taking any kind of antidepressant.
- Nausea
- Changes in the digestive system, including constipation or stomach upset
- Loss of libido
- Loss of appetite
- Weight gain or loss
- Erectile dysfunction
- Dry mouth
- Night sweats
- Changes in sleeping patterns
- Dizziness and blurry vision
Many individuals will stop taking antidepressant medication in order to stop the uncomfortable side effects associated with it. These medications make changes to your brain chemistry, which is one reason you may experience those side effects listed above. Side effects typically dissipate within a month of starting the medication as the body becomes accustomed to the drug.
There are some instances where individuals simply cannot take certain antidepressants. You may be allergic to an ingredient in the medication, or you simply may be unable to tolerate the side effects. It’s imperative to speak with your doctor so that you can make these decisions together. Once these medications are introduced into your system, you should not discontinue use without the consent of your physician. Stopping a medication abruptly without your doctor’s supervision can also lead to side effects or even make your depression worse.
What Medications Are Used to Treat Anxiety?
Many anxiety disorders are treated with SSRIs and SNRIs. These have been shown to be highly effective. There are some specifically anti-anxiety medications as well. In particular, benzodiazepines are used to treat anxiety.
Many physicians are reluctant to prescribe some medications for anxiety, however, as they might be abused. These medications include Xanax and Valium. In some instances, mild to moderate anxiety disorders may be treated with Ativan. Ativan has less of a risk of dependency, although there is still a measurable risk. Because you would need to consume more and more of any of these medications in order to maintain the same effect, physicians tend not to prescribe these medications for long-term use.
There are some medications that have been found to treat anxiety in an off-label manner. They include:
- Neurontin (gabapentin)
- Lyrica (pregabalin)
- Propranolol (a blood pressure medication)
Buspar has been approved by the FDA to treat anxiety, but it’s considered to be “in its own class.”
What Are Treatments for Panic Attacks?
Individuals with depression or anxiety may experience panic attacks as one of their chief symptoms. Typically, those who experience multiple panic attacks may be provided treatment in the form of medications plus psychotherapy. This approach may take some time, so follow your doctor’s advice.
What Other Methods Are Used to Prevent or Lessen the Incidence of Panic Attacks?
There are some behaviors and habits one can adapt in order to prevent the incidence of panic attacks. They include:
- Yoga
- Regular exercise
- Refraining from smoking, using recreational drugs, and taking alcohol or caffeine
- Improving sleep hygiene
- Acupuncture
Understanding Generalized Anxiety Disorder: Diagnosis and Treatment
To diagnose and treat GAD, you must first rule out any physical condition that might contribute to anxiety. In some instances, thyroid or endocrine system issues could contribute to panic attacks.
Some physical triggers for panic attacks also include low blood sugar, low calcium, and certain cardiac issues. Once a physician has ruled out a physical cause of panic attacks, treatment can be prescribed.
What Are the Treatments for Generalized Anxiety Disorder?
First, many physicians will prescribe some of the above medications for anxiety. This may be used with or without other forms of therapy, such as CBT. In addition to the medications mentioned previously, your physician may prescribe Tofranil, a tricyclic antidepressant.
Those with mild cases of anxiety disorder may benefit from treatment involving beta blockers (typically used to lower blood pressure) or even antihistamines. These medications may help those who experience social anxiety disorders or performance anxiety.
Buspar may also be used to treat panic attacks and GAD. This medication is not associated with dependence, which may make it a better choice for some individuals.
Multiple forms of psychotherapy are available to treat anxiety disorders, including restructuring your thinking patterns. Biofeedback may also be used by mental health professionals to combat GAD.
Finally, you can receive therapy in order to modify your lifestyle. This may be something as simple as adding exercise to your weekly routine, or it may involve meditation.
When treating depression or anxiety disorders, it’s important to see a professional. A wealth of professionals and treatment centers exist specifically to treat these conditions. If you want help for depression, call the National Depression Hotline. We have professionals who can talk with you and offer additional services based on your condition. We can also direct you to resources in your state.
Frequently Asked Questions
How Long Does It Typically Take for Antidepressants to Start Working?
You’ll typically notice initial improvements within two weeks of consistent use, but you shouldn’t expect full therapeutic effects for four to eight weeks. During the first week, you may experience side effects before benefits emerge. It’s critical to maintain adherence during the initial two-to-four-week window. If you don’t observe meaningful improvement after four weeks, your clinician may reevaluate your treatment plan, potentially adjusting dosage or considering alternative pharmacotherapy options.
Can You Safely Stop Taking Antidepressants Without Tapering off Gradually?
You shouldn’t stop antidepressants abruptly. Sudden cessation can trigger discontinuation syndrome, flu-like symptoms, insomnia, nausea, sensory disturbances, and hyperarousal, typically within one to three days. Paroxetine and venlafaxine carry a higher risk because of their shorter half-lives. A structured taper, guided by a clinician, is usually the safest approach.
Do Antidepressants Cause Weight Gain Over Long-Term Use?
Yes, many antidepressants can cause weight gain with long-term use. SSRIs like sertraline, fluoxetine, and escitalopram can carry varying risks. Paroxetine and mirtazapine are often associated with more noticeable increases, while bupropion is generally considered more weight-neutral. Discussing your medication’s side effect profile with your prescriber and monitoring changes over time is important.
Can Antidepressants Be Taken Alongside Anti-Anxiety Medications Simultaneously?
Yes, antidepressants are often taken alongside anti-anxiety medications. Clinicians may temporarily combine SSRIs like sertraline with benzodiazepines during early treatment to manage anxiety while the antidepressant takes effect. Careful monitoring is important, especially when combining medications that may increase the risk of side effects or interactions.
What Happens if You Accidentally Miss a Dose of Your Antidepressant?
Missing a single dose of an antidepressant usually won’t cause major consequences, especially with medications that have longer half-lives. In most cases, you should take the missed dose as soon as you remember unless it’s almost time for your next dose. Do not double up. If you’ve missed multiple doses, it’s best to contact your healthcare provider for guidance.
