The short version
- Major depressive disorder affects roughly one in five U.S. adults at some point in their lives.
- First-line treatments — antidepressant medication and structured psychotherapy — help most people who receive them.
- Combining medication with therapy works better than either alone for many people.
- If two or more treatments fall short, interventional options like TMS, SPRAVATO®, and ECT remain available.
- If you are in crisis, call or text 988 for the Suicide & Crisis Lifeline.
What depression is
Major depressive disorder goes beyond a rough week. The diagnosis requires depressed mood or loss of interest and pleasure most of the day, nearly every day, for at least two weeks — along with changes in sleep, appetite, energy, concentration, or self-worth, and sometimes thoughts of death.
A good evaluation also looks for medical mimics: thyroid disease, anemia, sleep apnea, medication side effects, and alcohol or substance use can all look exactly like depression. Structured tools like the PHQ-9 questionnaire help establish a baseline and track progress over time.
First-line treatment
Antidepressant medication and structured psychotherapy are the two first-line treatments, and they are often combined. SSRIs (such as sertraline and escitalopram) and SNRIs (such as venlafaxine and duloxetine) are the most commonly prescribed; bupropion and mirtazapine are frequent alternatives. Head-to-head trials show roughly similar effectiveness across this class, so the choice usually comes down to side effects, drug interactions, and what a person has responded to before.
On the therapy side, cognitive behavioral therapy (CBT) and interpersonal therapy (IPT) have the strongest trial support. For moderate to severe depression, combining medication with therapy outperforms either alone.
Guidelines call for measurement-based care: repeating the PHQ-9 at each visit and adjusting the plan at four to six weeks if improvement is inadequate. Antidepressants typically show early benefit within two to four weeks and full effect by six to eight weeks.
When first-line care is not enough
If the first medication fails, the answer is rarely to give up — it is to optimize the dose, switch to a different medication, or add an augmentation agent. When two adequate trials fall short, the condition is called treatment-resistant depression, and interventional options open up:
- TMS (transcranial magnetic stimulation) — FDA-cleared for depression that has not responded to medication; noninvasive, no anesthesia, typically 36 weekday sessions over six to nine weeks.
- SPRAVATO® (esketamine nasal spray) — FDA-approved for treatment-resistant depression and for major depressive disorder with acute suicidal ideation or behavior. It is dispensed only through the REMS program, carries boxed warnings for sedation, dissociation, respiratory depression, abuse and misuse, and suicidal thoughts and behaviors, and requires at least two hours of monitoring per session.
- ECT (electroconvulsive therapy) — the most effective acute treatment for severe depression, generally reserved for severe, refractory, or life-threatening cases.
Evidence and editorial interpretation
Where we editorialize: the evidence for exercise, sleep regularization, and light therapy as adjuncts is real but modest — they support treatment, they do not replace it. And a diagnosis of depression is a starting point for a conversation with a prescriber, not a self-diagnosis tool.
What a course of treatment looks like
- 1
Evaluation and diagnosis
A psychiatric evaluation reviews your symptoms, history, and medicines, and looks for medical causes that can mimic psychiatric conditions. It may include structured rating scales and collateral history from family.
- 2
Care plan and cost review
The clinic proposes a plan — medication, therapy, or both — and checks your insurance coverage, including any prior authorization requirements.
- 3
Starting treatment
Medications begin at a starting dose and are adjusted gradually; therapy sessions are scheduled; interventional options come up when first-line care has not worked.
- 4
Follow-up and adjustments
Regular check-ins track symptoms with measurement tools, review side effects, and adjust doses — or the plan itself — based on response.
- 5
Ongoing care
After symptoms improve, maintenance treatment lowers the risk of relapse, often coordinated with your primary care doctor or therapist.
Eligibility
Could a psychiatric evaluation help?
A clinic confirms all of this at your consultation. Use it to see whether a consultation is worth booking.
- You have had low mood or loss of interest most days for at least two weeks.
- Symptoms are affecting work, school, relationships, or physical health.
- You want a full evaluation, including medical causes that can mimic depression.
- You are open to medication, therapy, or both — the clinic will help you choose.
- Prior treatment has not brought lasting relief, and you want to revisit the plan.
Questions people ask
Should I take medication or see a therapist?
Both are legitimate first-line treatments, and the right answer depends on severity, preference, and access. For moderate to severe depression, the combination outperforms either alone. A psychiatrist can lay out both paths at the evaluation.
How long until an antidepressant starts working?
Some improvement often appears within two to four weeks, with full effect by six to eight weeks. If there is no meaningful response by then, guidelines recommend adjusting the dose or switching — not waiting indefinitely.
What if nothing has worked for me?
See our treatment-resistant depression guide. The first step is re-verifying the diagnosis, dose, and adherence; after that, interventional options — TMS, SPRAVATO®, ECT — have strong evidence.
Other conditions we cover
Treatment-resistant depression
When two or more antidepressant trials at an adequate dose and duration have not brought relief, care shifts to a focused re-review and interventional options. This is a turning point in treatment — not a dead end.
Anxiety
Anxiety disorders — generalized anxiety, panic disorder, and social anxiety — respond well to treatment. First-line care combines SSRI or SNRI medication with cognitive behavioral therapy, and often lasts.
PTSD
After trauma, some people develop intrusive memories, avoidance, and constant vigilance that do not fade on their own. Trauma-focused therapy and specific medications have the strongest evidence for PTSD.
OCD
Obsessions are unwanted intrusive thoughts; compulsions are rituals done to neutralize them. OCD responds to a specific combination: exposure-based therapy and high-dose SSRI medication.
Bipolar disorder
A mood condition with episodes of mania or hypomania — unusually elevated or irritable mood and energy — that typically alternate with depression. Getting the diagnosis right matters, because treatment for bipolar disorder differs fundamentally from treatment for depression alone.
Psychiatric clinics near you
Browse clinics by town or county, or read more about treatment in United States.
This guide is general information, not medical advice. Only a prescriber who knows your history can say which treatment is right for you. If you are in crisis, call or text 988.