Psychiatrist or general practitioner: who should prescribe an antidepressant — and why it matters

A significant share of first antidepressant prescriptions in Brazil is written by the general practitioner, the gynecologist, or the family physician. That makes sense from an access standpoint: the patient is already with that professional for another reason, trusts them, and the visit is cheaper and faster than seeking a psychiatrist. And in a portion of these cases, it works. The patient improves and moves on with life.

The problem appears in the other portion. And it is not a small one.

This text is about a question many patients ask at some point — usually when the first antidepressant did not work, or worked only halfway, or brought side effects no one explained how to manage. The question is: do I really need to see a psychiatrist, or can the general practitioner resolve this? The goal here is to answer honestly, without defensive posturing about specialties, presenting what technically distinguishes each approach and when each is indicated.

What the general practitioner does well

The general practitioner treating mild depression usually follows a straightforward flow: recognizes the depressive symptoms, prescribes a serotonin reuptake inhibitor — sertraline, escitalopram, fluoxetine — at a standard initial dose, and schedules a follow-up in four to six weeks to assess response. In cases where the patient responds well, this resolves things. Relief of symptoms, dose adjustment over time, and eventually discontinuation.

This flow works clinically for a specific range of cases: mild depressive episodes in patients without prior psychiatric history, without complicated comorbidity, without use of other medications that interact, without signs of bipolarity, and without chronic anxiety conditions that require specific approaches. In that scenario, the general practitioner is sufficient response, and overloading the psychiatrist for this makes no sense from a systems standpoint.

The tension point is that this range is smaller than it appears — and distinguishing who falls within it from who does not requires clinical training that primary-care education does not offer with the necessary depth.

What the psychiatrist does that the general practitioner does not

Three domains distinguish the psychiatric approach from primary-care management.

The first is differential diagnosis. What presents as depression may be bipolar disorder type 2 in a depressive phase — and prescribing an antidepressant without a mood stabilizer may induce a switch to hypomania or mania, a complication with lasting consequences. It may be chronic dysthymia with a superimposed major depressive episode — and adequate treatment requires a different combination. It may be depression with obsessive features, and that changes the choice of molecule. It may be a personality disorder with secondary depressed mood, in which case an antidepressant alone tends to disappoint. The psychiatrist investigates these scenarios before prescribing. The general practitioner, by training, is not equipped to make this distinction routinely.

The second is refined molecule selection. Not every antidepressant suits every patient, even within similar clinical pictures. A patient with preserved libido and good sleep quality may receive an SSRI without a problem. A patient with libido already reduced by depression is likely to worsen on the same prescription — and the psychiatrist knows there are options (bupropion, mirtazapine, agomelatine, vortioxetine) with different side-effect profiles that may be more appropriate. A patient with a strong anxious component may benefit from escitalopram; a patient with predominant apathy may respond better to bupropion. This customization requires a clinical repertoire acquired only through years of specifically psychiatric practice.

The third is active management of side effects. The general practitioner tends to advise “endure the first two weeks” and reassess. The psychiatrist has specific strategies: splitting the dose, changing timing, using an adjuvant for initial nausea, switching to a different molecule within the same class, adding a low-dose second-class agent to counter a specific side effect. This management makes the difference between a patient who continues treatment and one who drops out in the first month because they could not tolerate it.

When the general practitioner is well indicated

The scenario in which starting with the general practitioner is a good decision has recognizable characteristics: mild first depressive episode, no significant family psychiatric history, no use of other psychotropics, no signs suggestive of bipolarity, no associated chronic anxiety or obsessive conditions, and a good alliance with the clinician. In this scenario, starting treatment with the general practitioner is reasonable — provided there is an agreement that, if there is no response within eight to twelve weeks or if the case becomes more complex, the patient will be referred to a psychiatrist.

The problem arises when the general practitioner resists referring, increases the dose without success, switches to another molecule without investigating why the first failed, or insists on treating a case that has already shown itself to be outside his technical comfort zone. That is not ill will — it is a training limit. Recognizing the limit is part of what makes the good physician.

Signs you should be with a psychiatrist, not a general practitioner

Some signs indicate quite clearly that the case requires specific psychiatric evaluation and cannot be conducted in primary care. It is worth knowing them.

If you have already taken two different antidepressants and neither worked fully, the case probably requires an investigation the general practitioner is not going to do. If you have a family history of bipolar disorder, schizophrenia, or severe depression, the risk that your case is more complex than it appears is higher, and a psychiatrist will investigate this before writing the first prescription. If you have had episodes of elevated energy, reduced sleep without tiredness, the sensation of ideas running fast — even if you thought it was “just a good phase” — that history must be read by a psychiatrist before being treated as simple depression. If you have significant anxiety, obsessive, eating-related, or personality-related conditions alongside, quality treatment involves more than an SSRI. If you are a physician, lawyer, executive, or professional in a position of responsibility that demands full cognitive preservation, choosing the right molecule matters greatly, and this is specialist territory.

What you gain from this decision made well

The goal here is not to remove the general practitioner from the picture — many of them are attentive and responsible professionals, and a large share of treatments that begin and resolve begin in their hands. The goal is to recognize the training limit and to choose the right door for the case at hand.

When a patient with a complex case starts directly with a psychiatrist, they gain time: they avoid months of inadequate treatment, they avoid the frustration of “antidepressants don’t work for me,” they avoid the suspicion — often false — that the problem is resistant. When a patient with a mild case starts with a general practitioner and responds, they also gain: they avoid a specialist waiting list, resolve quickly, keep their life moving. Both choices can be good. The mistake is when the complex case is pushed through a simple flow, and pays with lost time.

If you are already on the second antidepressant without response, or have a history that suggests the case is not simple, this is the moment to see a psychiatrist. It is not a defeat for primary care. It is referral at the right time, which is how the system works when it works well.

Dr. Leonardo Sodré is a medical psychiatrist in Brasília (CRM-DF 14,206 · RQE 14,761), with formal training and interest in psychoanalysis. This content is informational and educational, and does not replace individual clinical evaluation, diagnosis, or treatment.