Evidence: Lam RW, Kennedy SH 2024 · sources last checked 2026-08-20

Ajax Harwood Clinic

Depression

Depression is a persistent change in mood, energy, thinking and sleep that lasts weeks or longer and affects what you are able to do. It is not sadness and it is not a weakness of character — the changes are in how the brain is functioning, which is why you cannot reason or will your way out of it.

Get help straight away if

These are uncommon, but they need same-day care — go to an emergency department, do not wait for an appointment.

Contact us promptly if

Not an emergency, but worth being seen sooner rather than waiting it out.

What usually happens

Depression is not sadness. People often expect to feel sad and are confused to feel flat, numb, exhausted or irritable instead — and physical symptoms like disturbed sleep, appetite changes and unexplained aches are part of it rather than something separate.

If you start an antidepressant, expect weeks rather than days. Sleep and appetite often improve first, mood later, and the first fortnight can feel worse before it feels better. Most people who conclude the treatment does not work stopped during that window.

There is a period early in treatment when energy and drive return before mood does, and that combination carries risk. It is the reason we follow up sooner after starting than people expect, and the reason to tell someone if you feel worse rather than waiting.

Treatment is not only tablets. Talking therapies work as well as medication for many people and better in combination for some, and exercise, sleep and reducing alcohol have effects large enough to count as treatment rather than advice.

Coming off is a planned process, not a stop. Reducing gradually avoids withdrawal symptoms that are easily mistaken for relapse, and the two get confused often enough that it is worth planning in advance.

At your appointment

We will ask directly about thoughts of suicide and self-harm. It is a routine question, asking about it does not make it more likely, and an honest answer changes what we can offer.

Questions about periods of unusually high energy or reduced need for sleep in the past, because that history changes which treatment is safe to start.

Blood tests where indicated — thyroid, anaemia and vitamin deficiencies can all contribute and are worth excluding.

Earlier follow-up than you might expect after starting or changing treatment, because the first weeks are when it matters most.

Worth asking

Curious what your doctor is weighing up? The clinical tool we use for depression is open to anyone — it is detailed and written for clinicians, and you are welcome to read it.

Open the clinician reference →

General health information for Ajax Harwood Clinic patients and the public — not medical advice, and not a substitute for seeing your own doctor. In an emergency call 911.