Chantix Side Effects
What should I watch for?
It is okay if you do not succeed at your attempt to quit and have a cigarette. You can still continue your quit attempt and keep using this medicine as directed. Just throw away your cigarettes and get back to your quit plan.
Talk to your health care provider before using other treatments to quit smoking. Using this medicine with other treatments to quit smoking may increase the risk for side effects compared to using a treatment alone.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.
Decrease the amount of alcoholic beverages that you drink during treatment with this medicine until you know if this medicine affects your ability to tolerate alcohol. Some people have experienced increased drunkenness (intoxication), unusual or sometimes aggressive behavior, or no memory of things that have happened (amnesia) during treatment with this medicine.
Sleepwalking can happen during treatment with this medicine, and can sometimes lead to behavior that is harmful to you, other people, or property. Stop taking this medicine and tell your doctor if you start sleepwalking or have other unusual sleep-related activity.
Patients and their families should watch out for new or worsening depression or thoughts of suicide. Also watch out for sudden changes in feelings such as feeling anxious, agitated, panicky, irritable, hostile, aggressive, impulsive, severely restless, overly excited and hyperactive, or not being able to sleep. If this happens, call your health care professional.
If you have diabetes and you quit smoking, the effects of insulin may be increased and you may need to reduce your insulin dose. Check with your doctor or health care professional about how you should adjust your insulin dose.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Difficult or labored breathing
tightness in the chest
Incidence not known
feeling sad or empty
feelings of panic
loss of interest or pleasure
seeing, hearing, or feeling things that are not there
thoughts of killing oneself
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
bloated or full feeling
change in taste
difficulty having a bowel movement (stool)
excess air or gas in the stomach or intestines
general feeling of discomfort or illness
lack or loss of strength
loss of taste
unusual tiredness or weakness
Acid or sour stomach
body aches or pain
itching skin or rash
loss of appetite
loss of voice
sleepiness or unusual drowsiness
stomach discomfort or upset
stuffy or runny nose
unusual drowsiness, dullness, or feeling of sluggishness
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.