Understanding Depression: Signs, Treatment, and When to See a Doctor

Depression affects approximately 8% of Canadian adults at some point in their lives. Despite being one of the most common and treatable mental health conditions, many people wait years before seeking help — often because they're not sure what they're experiencing is depression, or because they believe they should be able to “push through it.”

If You're in Crisis

If you're having thoughts of self-harm or suicide, please contact Crisis Services Canada at 1-833-456-4566 (24/7) or text 45645. You can also go to your nearest emergency department.

Key Signs of Depression

Depression looks different for everyone, but these are the most common signs. A diagnosis typically requires at least five symptoms present for two or more weeks:

Persistent low mood

Feeling sad, empty, or hopeless most of the day, nearly every day, for at least two weeks.

Loss of interest or pleasure

Activities you used to enjoy — hobbies, socializing, exercise, sex — no longer feel appealing or rewarding.

Fatigue and low energy

Feeling exhausted even after a full night’s sleep. Simple tasks like showering or making a meal feel overwhelming.

Sleep changes

Sleeping too much (hypersomnia) or too little (insomnia). Waking up early and being unable to fall back asleep.

Difficulty concentrating

Trouble making decisions, remembering things, or focusing on tasks. Feeling like your brain is in a fog.

Additional signs to watch for:

Changes in appetite or weight (significant increase or decrease)
Feelings of worthlessness or excessive guilt
Withdrawal from friends, family, and social activities
Physical symptoms: unexplained headaches, back pain, digestive issues
Irritability or agitation (more common in men)
Thoughts of death or suicide

Sadness vs. Clinical Depression

Normal Sadness	Clinical Depression
Has a clear cause (loss, disappointment)	Often has no obvious trigger
Comes in waves; you still have good moments	Persistent low mood most of the day, most days
Gradually improves with time	Doesn’t improve without treatment
You can still enjoy some things	Nothing feels enjoyable or rewarding
Self-esteem stays intact	Feelings of worthlessness or excessive guilt
Duration: days to a few weeks	Duration: two weeks or longer, often months

Treatment Options

Depression is highly treatable. Most people see significant improvement with the right combination of approaches:

Medication

SSRIs (sertraline, escitalopram, fluoxetine) are the most commonly prescribed first-line antidepressants. They're safe, effective, and non-addictive. Takes 2–4 weeks to start working. Your doctor can prescribe these during a virtual consultation.

Therapy

Cognitive Behavioral Therapy (CBT) is the gold standard. It helps you identify and change negative thought patterns. Other effective approaches include Interpersonal Therapy (IPT) and Behavioral Activation. Your doctor can refer you.

Lifestyle changes

Regular exercise (even 30 minutes of walking), consistent sleep schedule, reducing alcohol, social connection, and structured daily routines all have evidence supporting their role in depression recovery.

Combined treatment

For moderate to severe depression, combining medication with therapy produces the best outcomes. Your treatment plan should be individualized based on symptom severity and personal preferences.

When to See a Doctor

Talk to a doctor if:

Your low mood has lasted more than two weeks
You've lost interest in things you normally enjoy
You're having trouble functioning at work, school, or home
You're withdrawing from people
You're using alcohol or substances to cope
You're having thoughts of death or self-harm
Someone close to you has expressed concern about your mood

You don't need to wait until you're at your worst. Early treatment leads to better, faster recovery.

Canadian Mental Health Resources

Crisis Services Canada

1-833-456-4566 (24/7) | Text 45645

Canadian Mental Health Association

cmha.ca — Local branches offer programs and support

Mood Disorders Society of Canada

mdsc.ca — Peer support and depression resources

Frequently Asked Questions

What’s the difference between depression and sadness?

Sadness is a normal emotion that passes with time and usually has a clear cause. Depression is a medical condition where low mood, loss of interest, and other symptoms persist for at least two weeks and interfere with daily functioning. Depression often has no obvious trigger and doesn’t improve on its own without treatment.

Can depression go away without treatment?

Mild episodes sometimes improve with lifestyle changes, but clinical depression typically requires treatment — either therapy, medication, or both. Without treatment, depression tends to recur and can worsen over time. The earlier you seek help, the better the outcome.

How long does it take for antidepressants to work?

Most antidepressants (SSRIs, SNRIs) take 2–4 weeks to start working and 6–8 weeks to reach full effect. Side effects are usually mild and often improve within the first two weeks. Your doctor will monitor your progress and adjust if needed.

Can I talk to a doctor about depression online?

Yes. MediNote offers same-day phone consultations with licensed Canadian physicians who can assess depression, prescribe medication, provide therapy referrals, and issue sick notes or medical documentation — all for a $55 flat fee.

Is depression covered by OHIP or provincial health insurance?

Doctor visits for depression (including virtual consultations with licensed physicians) are generally covered by provincial health plans. Medication costs depend on your province and insurance. Therapy with a psychologist is usually not covered but may be partially covered by private insurance.

This article is for informational purposes only and does not constitute medical advice. Content reviewed by licensed Canadian physicians. Last updated February 2026.