Smoking and Depression Australia: 5 Proven Truths About Mood, Nicotine, and the Trap Most Smokers Don’t See

By Michael Whelehan | Certified Master Hypnotherapist and Master NLP Practitioner | Breathe Hypnotherapy | Updated May 2026

Smoking and depression in Australia are caught in a cycle that traps millions of people who are already struggling. The most widely held belief among smokers with mental health conditions is that cigarettes help them cope. The research tells a different story, and it is one worth understanding clearly, because the belief itself is part of what keeps the habit locked in place.

Why Smokers With Depression Believe Cigarettes Help Their Mood

The belief that smoking relieves stress, lifts mood, or reduces anxiety is almost universal among long-term smokers. It feels true. After a few hours without a cigarette, tension builds, irritability rises, and concentration deteriorates. Then a cigarette is smoked, and within minutes that discomfort disappears. The smoker experiences genuine relief.

The problem is in the interpretation of what just happened.

What feels like stress relief is actually the resolution of nicotine withdrawal. The discomfort was not caused by the pressures of daily life. It was caused by the absence of nicotine in a brain that has become dependent on it. The cigarette did not reduce the person’s baseline stress level. It temporarily returned it to where it would have been without the addiction present at all.

This distinction matters enormously for smokers managing depression and anxiety. The cigarette is not a coping tool. It is a reset button for a problem the cigarette created. A neurobiological analysis published in PMC confirms this directly: smokers may perceive and report that smoking reduces stress because abstinence from smoking creates stress in the first place.

The Withdrawal Feedback Loop Explained

Understanding this loop is the most important thing a smoker with depression can take from this article.

When a person smokes regularly, the brain adapts to the presence of nicotine by downregulating its own dopamine and serotonin activity. These are the same neurotransmitter systems involved in mood regulation, motivation, and emotional resilience. Over time, the brain requires nicotine input simply to function at what has become its new, adjusted baseline.

When nicotine levels drop between cigarettes, the brain signals distress. This produces symptoms that in a person with depression are genuinely difficult to distinguish from their mental health condition: low mood, irritability, difficulty concentrating, restlessness, and anxiety. Smoking resolves these symptoms instantly, which powerfully reinforces the belief that cigarettes are managing the underlying depression.

In reality, the cigarette is managing a withdrawal state it created. The person is not medicating depression with nicotine. They are medicating nicotine dependence with nicotine, and then attributing the relief to mental health management.

This is the feedback loop. The more consistently smoking is used as a response to low mood or stress, the more entrenched the association becomes at a subconscious level, and the more impossible quitting feels to someone who genuinely believes their mental health depends on it.

The Australian Data on Smoking and Depression

The scale of smoking and depression overlap in Australia is significant and consistently documented.

According to the AIHW National Drug Strategy Household Survey 2022-23, Australians with a mental health condition were more than twice as likely to smoke daily as those without one, at 15.4% compared to 7.4%. The same data shows that people experiencing high psychological distress were 2.3 times as likely to smoke daily as those with low distress.

These figures reflect a population that has disproportionately high rates of smoking and disproportionately high barriers to quitting, in part because of the belief that cigarettes are providing mental health support that would disappear without them.

Research published in BJPsych Bulletin via PMC found that smoking rates among people with common mental health conditions remain around 50% higher than those in the wider population, and identified this as a significant driver of the 10 to 20 year reduced life expectancy seen in people with serious mental illness. The same research found that concern about worsening mental health after quitting is one of the most frequently cited barriers to cessation attempts in this group.

A study cited by Tobacco Harm Reduction research commentary, drawing on qualitative research published in Health Expectations, interviewed 17 Australians living with mental illness about their smoking experiences. All participants agreed that life was better after quitting. This finding sits alongside the broader research consensus that the anticipated worsening of mental health after quitting rarely materialises, and that the actual outcome is typically the opposite.

What Actually Happens to Mood When You Quit Smoking

The clinical evidence on what quitting smoking does to mood is consistently more positive than most smokers with depression expect, and more positive than many clinicians communicate.

Research published in BJPsych Bulletin via PMC found that quitting smoking is associated with reduced depression, anxiety, and stress, with effect sizes at least as large as those seen with antidepressant medication. This finding has been replicated across multiple population studies and holds even for people with diagnosed mental health conditions.

The mechanism behind this is consistent with the withdrawal loop described above. When a person stops smoking and moves through the withdrawal period, the brain’s dopamine and serotonin systems gradually recalibrate without nicotine interference. The artificial baseline depression created by dependence begins to lift. The absence of the constant withdrawal-relief cycle removes a significant ongoing source of mood disruption from daily life.

The transition period is genuinely uncomfortable for most people and can be more intense for those already managing depression or anxiety. This is real and should not be minimised. However, the discomfort of withdrawal is temporary and time-limited. The mood benefits of sustained cessation are lasting.

For smokers with depression who have been told, or who believe, that quitting will make their mental health worse, the evidence does not support that concern as a long-term outcome.

If you would like to read more about how hypnotherapy supports smokers through this transition, visit the Breathe Hypnotherapy.

Why Hypnotherapy Works Differently for Mental-Health Smokers

Standard quit approaches were largely developed for smokers without significant mental health complexity. Nicotine replacement therapy addresses the physical component of withdrawal but does nothing to change the deeply held belief that cigarettes manage mood. Willpower-based approaches ask the person to tolerate discomfort while the subconscious mind is still operating from the association that smoking equals emotional relief.

For a smoker with depression, that association is particularly powerful and particularly resistant to conscious override. The subconscious link between smoking and mood management has typically been reinforced thousands of times across years or decades of use. Telling a person with depression to simply decide to quit, and endure the short-term discomfort, ignores the neurological reality of what they are up against.

Hypnotherapy addresses this differently. Working directly at the subconscious level, in a deeply relaxed and focused state, it becomes possible to update the association between smoking and emotional relief. The goal is not to ask the person to resist the belief that cigarettes help their mood. The goal is to replace that belief at the level where it operates, so that the pull toward smoking in moments of distress is no longer automatic.

For smokers whose identity as a smoker is tangled with their sense of emotional survival, this distinction in approach is not a minor one. It targets the actual mechanism maintaining the habit rather than relying on the person to overpower it by force of will.

You can learn more about how this process works on the Breathe Hypnotherapy smoking cessation blog.

The Bottom Line on Smoking and Depression in Australia

Smoking and depression in Australia are connected through a self-reinforcing cycle built on a misattribution: the belief that cigarettes are relieving depression when they are in fact sustaining a withdrawal loop that generates mood disruption in the first place. The evidence consistently shows that quitting improves mood, that the feared worsening of mental health rarely materialises long-term, and that people with mental illness who quit overwhelmingly report that life is better for having done so.

The trap is not the addiction itself. It is the belief that the addiction is helping.

Individual results may vary. Hypnotherapy is most effective when you are genuinely ready to make a change. Your results will depend on your mindset, readiness, and personal commitment. This article is intended for general educational purposes only and is not a substitute for medical advice. If you are experiencing depression, anxiety, or any mental health condition, please consult your GP or a qualified mental health professional before making changes to your treatment or management plan. Hypnotherapy is not a treatment for depression, anxiety, or any mental health condition. The success rates referenced on the Breathe Hypnotherapy website are based on documented client outcomes from Breathe Hypnotherapy’s practice.