What is the adult dosage for Chantix for smoking cessation?

Nina Evans
The adult dosage for Chantix (varenicline) for smoking cessation starts at half a milligram a day, and then works up to 2 mg a day. Your doctor will start you on Chantix for about a week before your quit day. For the first three days, you'll take a .5 mg pill once a day. For the next four days, you'll take a .5 mg pill twice a day. On the seventh day, you'll stop smoking; now the Chantix is blocking nicotine to your body and helping you overcome withdrawal from cigarettes.

For the second week, you'll start taking a 1 mg pill twice a day. You'll stay on Chantix (varenicline) for a total of 12 weeks. If you have bothersome side effects, talk to your doctor, who may adjust your dose. If you're still having troubling quitting after 12 weeks, your doctor may extend your prescription.

The adult dosage of Chantix (varenicline), a smoking cessation medication, can vary. Always follow the exact dosage your physician recommends. The Chantix dosage your doctor orders will be listed on the prescription label. Here is the usual dosage for adults taking Chantix to quit smoking, though your dosage may be different:

  • .5 mg once a day for days 1 to 3.
  • .5 mg two times a day for days 4 to 7.
  • 1 mg two times a day from day 8 until the medication is completed.


Continue Learning about Dependency Agent

What drugs may interact with varenicline?
Donna Hill Howes, RNDonna Hill Howes, RN
Some patients who took varenicline along with nicotine replacement therapy (NRT) reported higher rat...
More Answers
What should I know before taking varenicline?
Donna Hill Howes, RNDonna Hill Howes, RN
Bupropion and varenicline have been shown to help people with schizophrenia quit smoking. But relaps...
More Answers
How effective is varenicline?
Donna Hill Howes, RNDonna Hill Howes, RN
Studies show that people who use varenicline at the recommended dose of 2 mg a day are 3 times more ...
More Answers
What is varenicline (Chantix)?
Dr. Joseph I. Miller, MDDr. Joseph I. Miller, MD
Varenicline, more commonly known as Chantix, is a new class of drugs which blocks the pleasant effec...
More Answers

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.