Major depressive disorder is treated with medication, psychotherapy, or a combination of both, depending on how severe your symptoms are and how you respond over time. About 50% to 55% of people reach remission within the first two treatment steps, and the odds improve further when therapy and medication are used together. Treatment isn’t one-size-fits-all, and the process often involves adjustments over weeks or months to find what works.
First-Line Medication: What to Expect
SSRIs are the standard starting point for antidepressant treatment. This class includes commonly prescribed medications like sertraline, escitalopram, fluoxetine, and citalopram. They work by increasing the availability of serotonin in the brain, which helps regulate mood. SSRIs are favored not because they’re dramatically more effective than older drugs, but because they tend to have fewer and more tolerable side effects.
If SSRIs aren’t a good fit, other first-line options include SNRIs (like venlafaxine and duloxetine), which target both serotonin and norepinephrine, along with bupropion and mirtazapine, which work through different pathways. The choice between these often comes down to your specific symptoms, other health conditions, and which side effects you’re most willing to tolerate.
About 38% of people taking SSRIs experience at least one side effect. The most common are changes in sexual functioning, sleepiness, and weight gain. These effects vary widely between individuals and between specific medications, which is one reason switching drugs is so common in depression treatment.
How Long Medication Takes to Work
Antidepressants don’t work overnight. Most people can expect to wait 2 to 4 weeks before noticing any improvement, and full remission typically takes 8 to 12 weeks. An early sign that a medication is working is at least a 20% drop in symptom severity within the first month. That early response is one of the strongest predictors that the medication will lead to full remission.
If you haven’t seen at least some improvement (around 25%) after four weeks, your prescriber will likely reassess. If you’ve reached the maximum tolerable dose and still haven’t improved by at least 50% after six to eight weeks, it’s usually time to try a different approach. That might mean switching medications, adding a second medication from a different class, or layering in psychotherapy.
Realistic Remission Rates
The largest real-world study of depression treatment, known as STAR*D, tracked what happens as people move through successive treatment steps. The results are sobering but useful to understand. With the first medication tried, 28% of people achieved remission. When those who didn’t respond moved to a second treatment step, another 25% reached remission. By the third step, remission rates dropped to around 12% to 20%, and by the fourth step, about 10%.
The cumulative picture is more encouraging: after two rounds of treatment, roughly half of all patients have reached remission. But each successive step yields diminishing returns, which is why getting the first and second treatments right matters so much. It also underscores why combining medication with psychotherapy, rather than relying on medication alone, can make a meaningful difference early on.
Psychotherapy Options
Two forms of therapy have the strongest evidence for treating depression: cognitive-behavioral therapy (CBT) and interpersonal therapy (IPT). CBT focuses on identifying and changing negative thought patterns and behaviors that feed depression. IPT focuses on resolving relationship difficulties and life transitions that contribute to or worsen depressive episodes. Both are structured, typically lasting 12 to 20 sessions, and both aim to help you build practical coping tools rather than just talk through feelings.
Psychotherapy alone is a reasonable first choice for mild to moderate depression. For more severe cases, combining therapy with medication produces better outcomes than either one alone. One large trial found that 72.6% of people with recurrent depression recovered with combined treatment, compared to 62.5% with medication only. The benefit was most striking in people with severe, nonchronic depression, where recovery rates jumped from 51.7% with medication alone to 81.3% with the combination.
After remission, CBT and mindfulness-based cognitive therapy are both effective at helping prevent relapse, giving you skills to recognize and interrupt depressive patterns before they take hold again.
When Standard Treatments Don’t Work
If you haven’t responded adequately to at least two different antidepressant trials, your depression is generally classified as treatment-resistant. This isn’t a dead end, but it does shift the treatment approach toward more intensive options.
Electroconvulsive therapy (ECT) remains the most effective intervention for treatment-resistant depression. It involves brief electrical stimulation of the brain under general anesthesia, typically three times per week. Up to 75% of people with treatment-resistant depression achieve remission with ECT, making it far more effective than any medication at that stage. The procedure has evolved considerably from its early reputation, though side effects like short-term memory disruption are still common.
Repetitive transcranial magnetic stimulation (rTMS) is a noninvasive alternative that uses magnetic pulses targeted at the prefrontal cortex. It doesn’t require anesthesia and is done in an outpatient setting. Response rates in treatment-resistant patients are around 29%, roughly double the rate seen with a third or fourth antidepressant trial. A newer version called deep TMS achieved remission in about 33% of patients, compared to 15% with a sham (placebo) treatment.
Esketamine, a nasal spray derived from ketamine, is another option for treatment-resistant depression. It’s used alongside an oral antidepressant and must be administered in a certified healthcare setting. You self-administer the spray under supervision, then are monitored for at least two hours afterward because it can cause temporary increases in blood pressure, sedation, and dissociation. Sessions may be as frequent as twice weekly initially, then taper to weekly or biweekly. You’ll need to avoid food for two hours and liquids for 30 minutes before each dose.
Exercise as a Treatment Tool
Physical activity has enough evidence behind it to be considered a genuine treatment component, not just a lifestyle suggestion. A large meta-analysis of randomized trials found a clear dose-response relationship between exercise and depression improvement. The minimum effective dose is about 320 MET-minutes per week, which translates to roughly 45 minutes of brisk walking five days a week, or about 30 minutes of jogging three to four days a week.
The optimal response occurred at around 860 MET-minutes per week, equivalent to about 60 minutes of moderate-intensity exercise most days. Interestingly, the relationship follows a U-shaped curve, meaning that extremely high exercise volumes don’t continue to add benefit and may even be less effective than moderate amounts. The type of exercise matters less than simply hitting a consistent, moderate dose.
How Long to Stay on Treatment
Once you’ve responded to treatment and your symptoms have lifted, the instinct to stop medication is understandable. But depression has a high relapse rate, and stopping too early is one of the most common reasons people end up back where they started.
After your first episode responds to treatment, continuation therapy for 4 to 6 months is standard. This phase isn’t about feeling better; it’s about suppressing an episode that hasn’t fully resolved biologically, even if your symptoms have improved. Stopping during this window significantly raises your relapse risk.
After that, maintenance therapy lasting 6 to 24 months is recommended to prevent a new episode from developing. How long you stay in maintenance depends on your history. If this was your first episode, it was clearly triggered by a specific life event, and you have no family history of depression, you may be a good candidate for gradually discontinuing. If you’ve had multiple episodes, or your depression is chronic, maintenance therapy may need to continue indefinitely. The goal is always to find the shortest effective duration, but for some people, long-term treatment is the most reliable way to stay well.