Infrequently, varenicline may cause serious mental/mood changes, even after stopping the medication. Drinking alcohol while taking this medication may increase the risk for mental/mood changes. Quitting smoking itself may also cause mental/mood changes. Stop taking varenicline and tell your doctor or pharmacist immediately if you have symptoms such as depression/suicidal thoughts, agitation, aggressiveness, or other unusual thoughts or behavior.Who should not take Chantix?
This medication is used in combination with a stop-smoking program (e.g., education materials, support group, counseling) to help you quit smoking. Varenicline works by blocking nicotine's actions in the brain. Quitting smoking decreases your risk of heart and lung disease, as well as cancer.
Discuss the risks and benefits of this medication, as well as other ways to quit smoking (such as nicotine replacement treatment), with your doctor.
Read the Medication Guide provided by your pharmacist before you start taking varenicline and each time you get a refill. If you have any questions, consult your doctor or pharmacist. There are two ways to use varenicline to help you quit smoking. The first way is to set a date to quit smoking before beginning treatment with this drug. Begin taking varenicline as directed by your doctor, 1 week before the quit date. When you first start taking this medication, take one 0.5-milligram tablet once a day for 3 days, then increase to one 0.5-milligram tablet twice a day for 4 days. The dose is slowly increased to lessen the chance of side effects (such as nausea, unusual dreams). During this first week, it is okay to smoke. Stop smoking on the quit date and begin taking the dose prescribed by your doctor twice a day for the rest of the 12-week treatment period. The second way to use varenicline is to start taking the drug before you choose a date to quit smoking. Start with the 0.5-milligram tablets and increase the dose as directed by your doctor. Pick a date to quit smoking that is between days 8 and 35 of treatment. Stop smoking on the chosen quit date. No matter which way you use varenicline, always follow your doctor's directions carefully.
If this medication comes in a dosing package, carefully follow the directions on the dosing package. There are two types of dosing packs, a starting pack and a continuing pack, each containing different strengths of this medication. If this medication comes in a bottle, carefully follow your doctor's directions on the prescription label. If you have any questions about how to take this medication, talk to your doctor or pharmacist.
Take this medication by mouth after food and with a full glass of water.
Dosage is based on your medical condition and response to therapy.
Do not increase your dose or take this medication more often than prescribed. Your condition will not improve any faster, and the risk of serious side effects may be increased. Do not take more than 1 milligram twice a day.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.
Inform your doctor if you continue to smoke after a few weeks of treatment.
If you are successful and cigarette-free after 12 weeks of treatment, your doctor may recommend another 12 weeks of treatment with varenicline.
See also Warning section.
Nausea, headache, vomiting, drowsiness, gas, constipation, trouble sleeping, unusual dreams, or changes in taste may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: burning feeling in feet/toes, unusual pain in the legs when walking.
Get medical help right away if you have any very serious side effects, including: chest/jaw/left arm pain, weakness on one side of the body, severe headache, vision changes, confusion, slurred speech, seizure.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking varenicline, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease (especially kidney dialysis), mental/mood disorders, heart/blood vessel disease (such as coronary artery disease, peripheral vascular disease, stroke), seizure.
This drug may make you drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely.
This drug may make you more sensitive to alcohol (including increased drunkenness, unusual behavior, and limited or no memory of things that happened). Limit alcoholic beverages. Be aware of how alcohol affects you while taking this medication.
Older adults may be at a greater risk for nausea and other side effects while using this drug.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: nicotine replacement therapy (e.g., patch, gum, nasal spray).
Smoking can affect the way your body removes certain drugs. When you stop smoking, your doses of these drugs may need to be adjusted by your doctor. Tell your doctor if you take any of the following medications. Some of the drugs that smoking may affect, among others, are: "blood thinners" (e.g., warfarin), insulin, theophylline.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
Laboratory and/or medical tests (e.g., kidney function) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
Getting regular exercise and maintaining a nutritious diet, along with using educational materials, receiving counseling, and attending support groups, may help you to successfully quit smoking. Consult your doctor for details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised March 2015. Copyright(c) 2015 First Databank, Inc.
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