When an antidepressant does not provide enough improvement, it can be discouraging. Some patients may immediately wonder whether they have treatment-resistant depression. However, one unsuccessful medication trial does not usually provide enough information to make that determination.

Psychiatrists look at the broader treatment history, including which medication was used, the dose, how long it was taken, whether it was taken consistently, side effects, and the degree of symptom improvement. An adequate medication trial generally needs sufficient dose and duration before clinicians can reasonably decide that the treatment was not effective. 

Antidepressants Do Not Work the Same Way for Everyone

Depression is a complex condition, and treatment response varies significantly from person to person.

A medication that works well for one patient may provide only partial relief for another. Someone else may experience side effects that make the medication difficult to continue.



This variability is one reason psychiatrists often need to adjust treatment over time rather than expecting the first prescription to be the final answer. NIMH’s large STAR*D study specifically examined what happens when people with major depression do not respond adequately to an initial antidepressant and need additional treatment steps. 

The First Question Is Whether the Trial Was Adequate

Before deciding that a medication has failed, a psychiatrist may look closely at how it was used.

Was the medication taken long enough? Was the dose appropriate? Were doses missed frequently? Did side effects prevent the patient from reaching a therapeutic dose?

These details matter because a short or inconsistent trial may not accurately show whether the medication could have helped.



Psychiatrists may also consider whether another medication, medical condition, substance use, sleep problem, or psychiatric diagnosis could be affecting the response.

Partial Improvement Still Provides Useful Information

Treatment response is not always all or nothing.

A patient may sleep better, regain some concentration, or experience fewer negative thoughts while still having significant depression symptoms. That is known as a partial response.

In that situation, a psychiatrist may consider adjusting the dose, changing medication, adding another treatment, or modifying the overall plan rather than labeling the entire approach unsuccessful.



Carefully tracking which symptoms improve and which remain can provide valuable information when deciding what comes next.

Treatment Resistance Usually Reflects a Broader History

Treatment-resistant depression generally refers to depression that has continued despite multiple appropriate treatment attempts, although definitions can vary between clinical settings and research studies.

The important point is that treatment resistance is not usually determined after one disappointing prescription.

Clinicians may review several previous medication trials, psychotherapy, adherence, diagnosis, symptom severity, and other clinical factors before deciding whether the depression should be considered difficult to treat.



That evaluation helps prevent patients from moving prematurely to a more specialized treatment when another conventional approach may still be appropriate.

Additional Options Are Available When Needed

If depression continues despite adequate treatment attempts, psychiatry offers options beyond simply repeating similar medications.

Transcranial magnetic stimulation, or TMS, is one noninvasive treatment that may be considered for certain patients with persistent depression.

SPRAVATO® (esketamine) is another option for appropriately selected adults with treatment-resistant depression. The FDA currently approves SPRAVATO® for treatment-resistant depression in adults, including use as monotherapy or with an oral antidepressant under the approved labeling. 



These treatments require their own clinical evaluation and are not automatically the next step after one medication does not work.

A Treatment Plan Should Evolve With the Patient

One antidepressant not providing enough relief does not mean that depression is untreatable. It means the treatment plan may need to be reassessed.

Apex Interventional Psychiatry provides psychiatric evaluation, medication management, TMS, and SPRAVATO® treatment for patients with depression, including those whose symptoms have persisted despite previous care. If your first antidepressant has not provided the improvement you hoped for, contact Apex Interventional Psychiatry to schedule an evaluation and discuss the next appropriate step in your treatment plan.