What depression is

Major depression is more than a bad stretch. It means at least two weeks of low mood or loss of interest in things you normally enjoy, along with changes in sleep, appetite, energy, concentration, or how you see yourself. It is a medical condition involving mood, sleep, stress, and thinking, and it is not a character flaw or a failure of willpower.

How it shows up

In practice I often see something else:

• Anhedonia. Which is a lack of joy. Nothing feels bad, nothing feels good, and the things you used to look forward to are chores.

• Irritability, especially in men and in new parents, that gets read as a temper problem.

• Slowed thinking and fog. Reading the same paragraph three times, forgetting words, taking twice as long on routine work.

• Sleep that is wrecked in either direction, including waking at 4 a.m. and not getting back to sleep.

• Thoughts of wishing you didn’t exist. This often shows up as fantasies about going off grid or wishing you lived a different life.

• Staying productive on the outside while everything on the inside takes enormous effort.

That last pattern is common in high-functioning people, and it delays care for years. If you are still showing up for work, the people around you, and sometimes you, assume you must be fine.

Getting the diagnosis right

Depression has look-alikes and companions. Before I recommend treatment, I screen for bipolar disorder, because an antidepressant given alone to someone with undiagnosed bipolar disorder can backfire. I also look at ADHD and anxiety, grief, burnout, trauma, alcohol and cannabis use, sleep disorders, and medical causes such as thyroid disease, anemia, low vitamin B12, and sleep apnea.

I use the PHQ-9, a nine-item questionnaire that measures depression severity (Kroenke et al., 2001). It is useful mostly for tracking: if your score is falling, the plan is working, and if it is stuck, we change something. I also ask directly about thoughts of suicide, because asking does not plant the idea and it tells me how to keep you safe.

Treatment

Medication. A large network meta-analysis of 21 antidepressants found that every one worked better than placebo for adults with major depression, though the effects were modest on average, and the drugs differed in how well people tolerated them (Cipriani et al., 2018). That fits what I see. There is no single best antidepressant, but there is usually a best one for you, based on your symptoms, your other medications, side effects you want to avoid, and what has or has not worked before.

Patience matters. In STAR*D, the largest real-world trial of depression treatment, about two-thirds of participants reached remission after up to four sequential treatment steps, but each step helped fewer people (Rush et al., 2006). The takeaway is not that treatment is a long shot. It is that a first medication that does not work is the start of the process, not the end of it.

Therapy. CBT, behavioral activation, and interpersonal therapy all have good evidence. For moderate to severe depression, combining therapy and medication often works better than either alone. I can help you find the right therapist or coordinate with the one you have.

Lifestyle, treated as real treatment. I presented research on lifestyle interventions for depression and anxiety at the American Psychiatric Association’s 2025 annual meeting, and I take this part of the plan seriously. A meta-analysis that corrected for publication bias still found that exercise reduces depressive symptoms (Schuch et al., 2016). Sleep regularity, daylight, alcohol, and social contact also matter. These are not substitutes for medication when you need it. They make every other treatment work better, and I will ask you to pick one or two to start, not ten.

When two medications have not been enough. Options include switching classes, adding a second medication, lithium augmentation, transcranial magnetic stimulation (TMS), and esketamine. If one of these is the right next step and I do not offer it directly, I will help you get to someone who does.

Safety

If you are having thoughts of ending your life, you do not have to wait for an appointment. Call or text 988, or go to the nearest emergency room.