Medical Disclaimer: This article is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk to a qualified healthcare provider about your mental health. If you are in crisis or having thoughts of suicide or self-harm, call or text 988 for the Suicide and Crisis Lifeline. For ongoing support and treatment referrals, you can also call the SAMHSA National Helpline at 1-800-662-4357.
Feeling anxious, irritable, or depressed after you quit smoking is common, and it’s usually temporary. These feelings are often part of nicotine withdrawal. As your brain chemistry adjusts to life without nicotine, your mood can dip before it settles. For most people, this eases within a few weeks, and it doesn’t mean quitting was a mistake.
Sometimes this low mood is more than a passing part of withdrawal. If your symptoms are severe or last more than a few weeks, it may be time to talk to a healthcare provider. If you’re having thoughts of suicide or self-harm, call or text 988 right away.
Let’s explore what nicotine does to the brain and how long these feelings usually last.
Why Quitting Smoking Changes How You Feel Emotionally
Smoking does more than build a habit. Over time, nicotine changes the brain’s chemistry. It raises dopamine, the messenger the reward system uses for pleasure and motivation. Each cigarette gives that system a lift, and the brain soon comes to expect it. To stay balanced, the brain adjusts its own chemistry to match.
That adjustment is what you feel when the nicotine is no longer in your system. With no nicotine coming in, the reward system runs low for a while. The brain has to relearn how to balance itself. Until it does, everyday things can feel less rewarding, and your mood can be low. That physical dip is a big reason the early days of quitting smoking can feel so hard.
Who Is Most Vulnerable to Anxiety and Depression After Quitting Smoking?
Not everyone who quits smoking goes through a rough patch with their mood. A few things, though, make it more likely and more intense. These factors include:
- A history of anxiety or depression. Smoking is far more common among people with mental health disorders, and they often find quitting harder. Many feel that cigarettes steady their mood, though that relief is mostly the easing of withdrawal between cigarettes. Quitting doesn’t have to set your mental health back. Many people feel less anxious and less depressed a few months after they quit than when they smoked.
- Heavier, longer-term smoking. The more nicotine your brain is used to, the harder the adjustment tends to be when it’s gone. A pack a day for 20 years usually means a bigger shift than a few cigarettes now and then.
- Quitting with no plan or support. Plenty of people quit on their own and do fine. Still, a plan and some support improve your odds and give you tools for the rough moments.
- A lot of stress while quitting. Withdrawal is a stressor on its own. Piling it on top of an already difficult time in your life can make the mood effects harder to handle.
If you see yourself in any of these instances, that’s useful to know. It means a nicotine patch alone may not be the whole answer. Pairing it with counseling, another quit aid, or a doctor’s guidance may work better for you. Continue to keep an eye on how you feel; if low mood or anxiety lasts more than two weeks, feels unmanageable, or gets worse, talk to your doctor. If you ever have thoughts of harming yourself, call or text 988 for the Suicide and Crisis Lifeline right away.
When to Seek Help for Depression or Anxiety After Quitting
There’s a real difference between the mood dip of withdrawal and a diagnosable anxiety or depressive disorder. The main clues are how long the symptoms last, how severe they are, and how much they disrupt your daily life.
Withdrawal symptoms are uncomfortable, but they typically peak in the first few days and start easing over the following weeks. Clinical depression and anxiety are different. They bring lasting symptoms that affect how you feel, think, and handle daily life, including your sleep, work, and relationships. That ongoing disruption is central to how the DSM-5-TR, the current diagnostic manual, defines a disorder.
Some signs that mean it’s time to check in with a professional include:
- Low mood, hopelessness, or emptiness that lasts more than two weeks
- Panic attacks that are new, keep happening, or get worse over time
- Loss of interest in activities or relationships that once felt meaningful
- Sleep problems that drag on past the first couple of weeks after quitting
- Any thoughts of self-harm or suicide
If you or someone you know is having thoughts of self-harm or suicide, call or text 988 to reach the Suicide and Crisis Lifeline. It’s available day and night. You can also reach the SAMHSA National Helpline at 1-800-662-4357 for free, 24/7 support and referrals.
In some cases, low mood or anxiety may not lift as withdrawal symptoms fade. That can point to pre-existing anxiety or depression. The smoking routine, along with the daily cycle of craving and relief, may have made the underlying problem easy to miss. When symptoms stick around, talk with a doctor or therapist. Going back to smoking isn’t the answer.
Smoking, Mental Health, and Co-Occurring Conditions
People living with a mental health disorder smoke at much higher rates than adults without one. According to the CDC, about 23% of adults living with a mental illness smoke, compared with about 15% of those without. The reasons are layered, but the pattern is clear.
Part of it is that many people use cigarettes to cope with stress or low mood. That relief is short-lived, and it doesn’t treat the root anxiety or depression. So quitting means giving up a coping habit along with the nicotine, which can feel destabilizing for a while.
This is why mental health matters so much as you attempt to quit. For someone with anxiety or depression, the cigarettes are only half the picture. Getting support for the mental health side, not just the smoking, can make your process more manageable.
If anxiety or depression becomes significant during or after quitting, it may be time for more support. Treatment can ease those symptoms and help address the condition underneath. At The Sylvia Brafman Mental Health Center, that care starts with mental health. We treat depression and anxiety, including when they show up alongside substance use.
Evidence-Based Tools for Managing Mood While Quitting Smoking
Several evidence-based tools can help with the mood dip that comes with quitting. The medications listed here are FDA-approved, and the CDC calls them safe and effective for adults who smoke and want to quit. They’re not right for everyone, though, so a doctor can help you choose which is most suitable for you. Most tools work best together, and a few need medical guidance.
Nicotine replacement therapy (NRT): Patches, gum, lozenges, nasal spray, and inhalers deliver a lower, steadier dose of nicotine while you quit. This eases withdrawal, including the irritability and low mood that come with it. According to the NIH’s Smokefree program, quit medications like NRT can double your chances of quitting. Patches, gum, and lozenges are available over the counter, while the nasal spray and inhaler need a prescription.
Varenicline: This prescription medication partly activates the same receptors nicotine binds to, while blocking nicotine itself. That reduces cravings and takes much of the reward out of smoking. It can make the withdrawal period easier to get through. Because it can have side effects, it should be used under a doctor’s supervision.
Bupropion: This medication began as an antidepressant and also helps people quit smoking. Because of that, a doctor may consider it for someone with a history of depression. It isn’t right for everyone. For example, it’s generally avoided for people with a seizure disorder or an eating disorder, so a prescriber will review your history first. Like varenicline, it’s available by prescription only.
Behavioral therapy: Therapeutic approaches work on the habits and thoughts behind smoking. That means the triggers, the routines, and the belief that a cigarette is the only way to handle stress. For example, Cognitive Behavioral Therapy (CBT) is a therapy commonly used for anxiety, and research suggests it can also improve long-term quit rates. This is skill-building that medication alone doesn’t provide. If anxiety ramps up after quitting, outpatient mental health treatment for anxiety can offer that kind of structured support.
Physical activity: Exercise helps too. Getting active, even a short walk, can ease cravings and withdrawal symptoms in the moment. It’s not a substitute for the other tools, but it’s a simple one to add.
Before starting any of the medications, ask a doctor or pharmacist which one fits you best. This is especially important if you take other medicines. If you have a mental health condition, mention it to your prescriber before trying varenicline or bupropion. Let them know if your mood or behavior changes.
What to Do If Quitting Smoking Has Worsened Your Mental Health
For some people, quitting smoking hits their mental health harder than expected. This is a recognized experience, and for most, it eases as the body adjusts. Resuming smoking won’t fix it, but help is available to support you as you work through this period. If you ever feel unsafe or have thoughts of harming yourself, get help right away. Call or text 988 for the Suicide and Crisis Lifeline, or call 911 if you’re in immediate danger.
A good first step is having a conversation with a primary care doctor or a mental health professional. They can figure out whether what you’re experiencing is withdrawal, an existing condition surfacing, or both. Be specific about when you quit and what you’re feeling. That timeline helps them pinpoint what’s going on and what kind of care fits your situation. If you take psychiatric medication, be sure to inform your prescriber that you recently quit smoking, since this can change how some medicines are processed.
When anxiety or depression starts getting in the way of daily life, the level of care should match the need. For milder symptoms, regular outpatient therapy may be enough. For something more disruptive, an Intensive Outpatient Program (IOP) or a more structured Partial Hospitalization Program (PHP) can step up the level of care. Both provide support during the day while you can still keep up with life outside treatment hours.
The Sylvia Brafman Mental Health Center offers both PHP and IOP near Fort Lauderdale for adults working through mood and anxiety disorders. That includes anxiety or depression that surfaces after quitting smoking. Reaching out for an evaluation isn’t a setback. It means you’re taking your whole health picture seriously. If you’re ready, reach out for a free assessment today.