Generic Name: varenicline (var-EN-i-kleen)
Brand Name: Chantix

Serious mental or mood problems (including depression, suicidal thoughts, suicidal attempts) and completed suicides have been reported in patients taking Chantix. Nicotine withdrawal may also have contributed to some of these events. However, these events have also occurred in patients who continued to smoke. These events have occurred both in patients with and without a history of mental or mood problems. Safety and effectiveness of Chantix in patients with a history of certain mental or mood problems (eg, schizophrenia, bipolar disorder, severe depression) have not been confirmed.

Watch patients who take Chantix closely. Stop taking Chantix and contact the doctor at once if new, worsened, or sudden symptoms such as depressed mood, hostility or agitation, or any unusual change in mood or behavior occur. Contact the doctor right away if any signs of suicidal thoughts or actions occur.

Discuss the benefits and the risks of Chantix with your doctor. Discuss any other questions or concerns with your doctor.


Chantix is used for:

Helping people to quit smoking cigarettes.

Chantix is a smoking cessation agent. It works in the brain by blocking the pleasurable effects of smoking. This helps to decrease your desire to smoke.

Do NOT use Chantix if:

  • you are allergic to any ingredient in Chantix or you have developed a skin reaction (eg, red, swollen, blistered, or peeling skin) from taking it

Contact your doctor or health care provider right away if this applies to you.

Slideshow: View Frightful (But Dead Serious) Drug Side Effects

Before using Chantix:

Some medical conditions may interact with Chantix. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have a history of kidney problems or dialysis, heart or blood vessel problems, mental or mood problems (eg, bipolar disorder, depression, schizophrenia), or suicidal thoughts or actions
  • if you have tried to quit smoking before and experienced any unusual symptoms or side effects
  • if you are using other medicines to quit smoking

Some MEDICINES MAY INTERACT with Chantix. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Nicotine replacement therapy because the risk of nausea, headache, vomiting, dizziness, stomach upset, and tiredness may be increased

This may not be a complete list of all interactions that may occur. Ask your health care provider if Chantix may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Chantix:

Use Chantix as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Chantix comes with an extra patient information sheet called a Medication Guide. Read it carefully. Read it again each time you get Chantix refilled.
  • Set a date to quit smoking. Start treatment with Chantix 1 week before your quit date unless your doctor directs you otherwise.
  • Take Chantix by mouth after a meal with a full glass (8 oz [240 mL]) of water.
  • Take Chantix on a regular schedule to get the most benefit from it. Taking it at the same time each day will help you remember to take it.
  • Even if you smoke after your quit date, continue to try to quit.
  • If you miss a dose of Chantix, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Chantix.

Important safety information:

  • Chantix may cause drowsiness, dizziness, fainting, or vision changes. It may also cause trouble concentrating, hallucinations, muscle cramps, or seizures. These effects may be worse if you take it with alcohol or certain medicines. Use caution if you drive or perform other possibly unsafe tasks while you are taking Chantix.
  • Chantix may be used as a part of a treatment program that includes a variety of treatment measures (eg, educational materials, counseling).
  • Tell your doctor about any other medicines that you take. If you are taking certain other medicines (eg, insulin, theophylline, warfarin), quitting smoking may affect their actions or side effects. Your dose of these medicines may need to be changed. Discuss any questions or concerns with your doctor.
  • Some patients have experienced changes in behavior or mood while taking Chantix. Contact the doctor at once if new, worsened, or sudden symptoms such as depressed mood; aggressive, agitated, or abnormal behavior; personality change; thoughts of hurting other people; or any unusual change in mood or behavior occur. Contact the doctor right away if any signs of suicidal thoughts or actions occur.
  • People who try to quit smoking may experience symptoms that could be caused by nicotine withdrawal. These may include the urge to smoke, depressed mood, trouble sleeping, irritability, frustration, anger, feeling anxious, trouble concentrating, restlessness, decreased heart rate, and increased appetite or weight gain. Some patients may experience worsening of mental health problems they already have, such as depression. Be sure to tell your doctor if you have a history of any of these problems. Discuss any questions or concerns with your doctor.
  • Stroke and heart attack have been reported rarely in patients using Chantix. However, smoking may also increase the risk for these events. Most of the reported cases occurred in patients who had a history of heart or certain blood vessel problems. Contact your doctor right away if you develop symptoms of a stroke (eg, confusion, one-sided weakness, slurred speech, vision problems) or a heart attack (eg, chest, jaw, or left arm pain; fainting; numbness of an arm or leg; sudden, severe headache or vomiting; vision changes). Contact your doctor right away if you develop any symptoms of new or worsening heart or blood vessel problems.
  • Lab tests, including kidney function, may be performed while you use Chantix. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Use Chantix with caution in the ELDERLY; they may be more sensitive to its effects.
  • Chantix should not be used in CHILDREN younger than 18 years old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Chantix while you are pregnant. It is not known if Chantix is found in breast milk. Do not breast-feed while taking Chantix.

Possible side effects of Chantix:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; gas; headache; increased appetite; nausea; stomach upset; taste changes; trouble sleeping; vivid, strange, or unusual dreams; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, throat, or tongue; unusual hoarseness); behavior changes; chest, jaw, or left arm pain; confusion; fainting; fast, slow, or irregular heartbeat; hallucinations; memory loss; new or worsening mental or mood problems (eg, aggression, agitation, anger, anxiety, depression, nervousness, thoughts of hurting other people); numbness of an arm of leg; one-sided weakness; persistent trouble sleeping; red, swollen, blistered, or peeling skin; seizures; severe headache; severe or persistent nausea; slurred speech; shortness of breath; suicidal thoughts or actions; vision changes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately.

Proper storage of Chantix:

Store Chantix at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). Store away from heat, moisture, and light. Keep Chantix out of the reach of children and away from pets.

General information:

  • If you have any questions about Chantix, please talk with your doctor, pharmacist, or other health care provider.
  • Chantix is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Chantix or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Chantix. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Chantix. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Chantix.

Issue Date: July 2, 2014
Database Edition 14.3.1.001
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

Hide
(web3)
Close