If you are still smoking and wondering, “can smokers use varenicline?” the short answer is yes. In fact, varenicline is a prescription medicine made specifically to help adults quit smoking. You do not have to be smoke-free before you start it. Many people begin taking it while they are still smoking, then set a quit date with their prescriber’s guidance.
Quitting is not a test of willpower. Nicotine changes the brain’s reward system, and cravings can feel urgent even when you deeply want to stop. Medication can give you more breathing room between a craving and a cigarette, especially when you pair it with a realistic quit plan and support.
Can smokers use varenicline while still smoking?
Yes. Most standard treatment plans have people start varenicline before their quit date. A common approach is to begin the medicine about one week before quitting, although your clinician may recommend a different schedule based on your needs. During those first days, you may still smoke, but the goal is to prepare for a planned stop rather than simply smoke as usual indefinitely.
Varenicline works by attaching to some of the same brain receptors affected by nicotine. It can reduce withdrawal symptoms and cravings, while also making cigarettes feel less rewarding if you do smoke. That combination is why it can be a helpful option for people who have tried to quit before and felt pulled back by powerful cravings.
Your prescription instructions matter. Varenicline is usually started at a lower dose and increased gradually to reduce side effects. Many treatment courses last 12 weeks, and some people may benefit from a longer course if their clinician recommends it. Do not change the dose, stop suddenly because of a mild side effect, or borrow medication from someone else without speaking with your prescriber.
Who may benefit from varenicline?
Varenicline is approved for smoking cessation in adults. It may be worth discussing if you smoke cigarettes daily, have relapsed after past quit attempts, wake up craving a cigarette, or have found that nicotine replacement alone did not control cravings well enough.
It can also be useful for people who feel nervous about quitting because they have tried before. A previous relapse does not mean you cannot quit. It often means your plan needs more support, better timing, or a treatment that addresses physical nicotine dependence more directly.
Medication is not a replacement for your own effort, but it can make that effort more manageable. People tend to have the strongest results when they combine medication with behavioral support, such as counseling, a quit coach, a support group, or a trusted person who knows their quit date. Build support around the moments when you usually smoke: driving, finishing meals, taking work breaks, drinking alcohol, or dealing with stress.
Important safety checks before you start
Varenicline is not right for every person, so a healthcare professional should review your health history and current medications. Tell your prescriber if you have kidney disease, because the dose may need to be adjusted. Also discuss any history of seizures, heart or blood vessel disease, mental health conditions, heavy alcohol use, pregnancy, plans to become pregnant, or breastfeeding.
Some people notice mood changes, agitation, depression, or unusual behavior while taking varenicline or during a quit attempt. Nicotine withdrawal itself can affect mood, sleep, and concentration, which can make it hard to tell what is causing a change. Still, take severe or concerning symptoms seriously. Contact a healthcare professional promptly if you notice new or worsening depression, anxiety, hostility, panic, or thoughts of harming yourself or someone else. If there is immediate danger, call or text 988 in the United States or seek emergency help.
Tell your prescriber about all medicines, supplements, and nicotine products you use. Some people use varenicline with nicotine replacement therapy, but that decision should be individualized. Combining treatments may be appropriate in certain cases, yet it can also increase side effects such as nausea, headache, dizziness, or sleep problems.
What side effects should smokers expect?
Nausea is one of the most common side effects. Taking varenicline after eating and with a full glass of water may help. Vivid dreams, trouble sleeping, headache, constipation, gas, and changes in taste can also happen.
For many people, these effects are temporary or manageable. But “manageable” does not mean you have to suffer in silence. If nausea is interfering with meals, sleep problems are making daily life difficult, or side effects feel intense, call the clinician who prescribed it. A change in timing, dose, or treatment plan may help.
Be cautious with alcohol until you know how varenicline affects you. Some people have reported increased intoxication, unusual behavior, or memory problems when drinking alcohol while taking it. Avoid driving or operating machinery if you feel dizzy, sleepy, or unable to focus.
Make the medication part of a real quit plan
Varenicline can reduce the physical pull of smoking, but your routines still need attention. Before your quit date, remove cigarettes, lighters, ashtrays, and other reminders from your home, car, and work bag. If you live with someone who smokes, ask them not to smoke around you and keep their supplies out of sight.
Plan a response for cravings before they hit. Cravings often peak and pass within a few minutes. Try drinking cold water, taking a short walk, chewing sugar-free gum, brushing your teeth, texting a support person, or doing slow breathing until the urge eases. The point is not to make cravings disappear instantly. It is to get through the next few minutes without smoking.
It also helps to identify the thought that usually comes before a cigarette. You may think, “I need one to calm down,” or “I already messed up today.” Answer that thought with something more useful: “A cigarette will restart the craving cycle,” or “One slip does not have to become a full relapse.” This is practical recovery work, not positive-thinking fluff.
If you smoke while taking varenicline after your quit date, do not decide the medication has failed. Contact your prescriber, look at what triggered the cigarette, and restart your plan right away. A lapse is information. It can show you where you need extra support, whether that is stress management, avoiding alcohol for a while, or a different strategy for social situations.
What about vaping or dual use?
If you smoke cigarettes and vape, be honest with your clinician about both. Dual use can keep nicotine dependence strong, even if you smoke fewer cigarettes. Varenicline is approved to help adults quit smoking cigarettes, while its use for vaping cessation may be considered differently by a clinician.
Set a clear target. Some people first focus on stopping cigarettes, then make a separate plan for vaping. Others need a plan that addresses both at once. What matters is avoiding the trap of replacing one nicotine habit with another without a path to becoming nicotine-free.
When to get extra help
Reach out for medical guidance quickly if you develop a rash with swelling, blistering, or trouble breathing; have a seizure; experience chest pain; or notice serious changes in mood or behavior. These situations need prompt attention.
For everyday challenges, support still matters. Tell someone when your quit date is. Keep your medication where you will remember it. Celebrate a smoke-free morning, a hard drive home, or a stressful day you handled without cigarettes. Those small wins are not small to your brain – they are evidence that you are building a new routine.
Your smoke-free life does not begin when quitting feels easy. It begins with the next decision to follow your plan, ask for help when you need it, and keep going.