A psychiatrist treats depression by combining a thorough medical evaluation with a personalized plan that typically includes medication, therapy, or both. Unlike therapists or counselors, psychiatrists are medical doctors who can prescribe drugs, order blood work, and rule out physical conditions that mimic depression. What happens at each stage of care looks different depending on the severity of your symptoms and how you respond to treatment.
What Happens at the First Appointment
Your first visit with a psychiatrist is an in-depth evaluation that usually lasts 45 to 90 minutes. The goal is to understand the full picture of your mental and physical health before recommending any treatment. This is more than a conversation about how you’re feeling right now.
The psychiatrist will ask about your current symptoms, how long they’ve lasted, and how severe they are. To meet the clinical threshold for major depressive disorder, symptoms like persistent sadness, loss of interest, sleep changes, fatigue, difficulty concentrating, or thoughts of worthlessness generally need to be present for at least two weeks and interfere with daily functioning. Standardized questionnaires can help measure the severity of these symptoms and create a baseline to track your progress over time, though they don’t replace the broader conversation.
Beyond your mood, the evaluation covers your full psychiatric history (previous episodes, past treatments, hospitalizations), your family history of mental illness, and a detailed social history. That social history is surprisingly broad: your living situation, relationship quality, employment stability, education, legal history, substance use, and financial stress. These factors shape both your diagnosis and which treatments are realistic for your life. The psychiatrist will also review your medical history, current medications, and any recent physical changes like pregnancy or menopause.
Ruling Out Physical Causes
One of the most important things a psychiatrist does is check whether something medical is driving your symptoms. No blood test can diagnose depression, but several conditions produce symptoms that look nearly identical to it.
An underactive thyroid is a classic example. It causes fatigue, low mood, weight gain, and trouble concentrating. Vitamin B-12 deficiency can do the same. So can hormonal disorders like Cushing’s disease or Addison’s disease. Your psychiatrist may order a thyroid panel, B-12 levels, a complete blood count, electrolytes (including calcium and magnesium), liver and kidney function tests, and sometimes a toxicology screen. If one of these tests comes back abnormal, treating the underlying condition may resolve your depressive symptoms entirely, or at least change which treatment makes sense.
How Antidepressant Medication Works
If medication is part of your treatment plan, your psychiatrist will choose from several classes of antidepressants based on your symptom profile, side effect tolerance, and any medications you’re already taking. All currently available antidepressants work primarily by changing how your brain handles chemical messengers called neurotransmitters, specifically serotonin, norepinephrine, and dopamine.
The most commonly prescribed options increase the availability of these neurotransmitters by blocking their reabsorption back into nerve cells. Some target serotonin alone, others target both serotonin and norepinephrine, and a few affect dopamine as well. Older classes of antidepressants work through a different mechanism, preventing the enzyme that breaks down these neurotransmitters from doing its job. These older medications tend to have more side effects and dietary restrictions, so they’re typically reserved for cases where newer options haven’t worked.
Starting an antidepressant isn’t an instant fix. Most take two to four weeks to produce noticeable changes in mood, and side effects like nausea, headaches, or sleep disruption often appear before the benefits do. Your psychiatrist will typically start at a lower dose and adjust upward based on your response.
How Often You’ll Have Follow-Up Visits
During the first weeks on medication, appointments are frequent. American Psychiatric Association guidelines recommend weekly visits during the first 90 days of antidepressant treatment. Other guidelines suggest every 10 to 14 days for the first six to eight weeks, with more frequent check-ins for severe depression. These early appointments exist for practical reasons: to monitor side effects, adjust your dose, and catch problems before they become reasons to quit treatment.
Once your symptoms stabilize, visits typically spread out to monthly or every few months. This continuation phase usually lasts at least four to nine months after you start feeling better. For people with recurrent episodes, a longer maintenance phase with periodic check-ins helps prevent relapse. Your psychiatrist will work with you to decide when and whether it’s safe to taper off medication, which is always done gradually.
Therapy as Part of Psychiatric Care
Psychiatrists often prescribe medication in combination with psychotherapy, and many provide therapy themselves. The types of therapy used for depression include cognitive behavioral therapy (CBT), which helps you identify and reframe negative thought patterns; interpersonal therapy, which focuses on improving relationships and communication that contribute to your depression; and mindfulness-based cognitive therapy, which combines meditation techniques with traditional talk therapy to reduce the risk of relapse.
In practice, some psychiatrists handle both medication and therapy in one appointment. Others focus primarily on medication management and refer you to a psychologist or licensed therapist for regular therapy sessions. In that case, your psychiatrist coordinates with your therapist to make sure both treatments are working together. Neither approach is better in the abstract. It depends on the complexity of your case and what’s available in your area.
When Standard Treatment Doesn’t Work
Roughly one-third of people with depression don’t respond adequately to the first antidepressant they try. Your psychiatrist may switch medications, combine two medications, or add a second drug to boost the effect of the first. If multiple medication trials and therapy haven’t produced lasting improvement, more intensive options exist.
Transcranial magnetic stimulation (TMS) uses targeted magnetic pulses to stimulate specific brain areas involved in mood regulation. It’s noninvasive, done in an office setting, and typically involves daily sessions over several weeks. Electroconvulsive therapy (ECT) is a more established option for severe, treatment-resistant depression. It’s performed under general anesthesia and works faster than most other treatments, sometimes producing improvement within a week or two.
Ketamine-based treatments represent a newer tier. Intravenous ketamine therapy is not a first-line treatment. It’s considered only after multiple antidepressant trials, therapy, and sometimes TMS or ECT have all failed to produce sustained improvement. Candidates are carefully screened: people with active substance abuse, a history of psychosis, uncontrolled high blood pressure, or unstable heart conditions are generally excluded. A nasal spray version works through a similar mechanism and is administered in a clinical setting where you’re monitored for a few hours afterward.
What Makes a Psychiatrist Different From Other Providers
A psychiatrist’s medical training is what sets them apart. They complete medical school and then a four-year residency in psychiatry, which means they understand how physical illness, medications, and brain chemistry interact. This matters most when depression coexists with other medical conditions, when symptoms are unusual or severe, or when previous treatments with a primary care doctor haven’t worked.
Primary care doctors prescribe the majority of antidepressants and handle mild to moderate depression effectively. Psychologists and licensed therapists provide therapy but cannot prescribe medication in most states. A psychiatrist fills the gap when you need someone who can do both, or when the medical complexity of your case requires specialized knowledge. For many people with depression, the most effective setup is a psychiatrist managing medication alongside a therapist providing regular talk therapy sessions.