VareniclineVarenicline tartrate

About Varenicline

Varenicline is a smoking cessation aid; MedlinePlus says it works by blocking the pleasant effects of nicotine on the brain and is used along with education and counseling. The label approves it as an aid to smoking cessation treatment, with dosing for adults, and does not recommend it for anyone 16 or younger because its efficacy was not demonstrated in that age group. The dose builds up over the first week: 0.5 mg once daily on days 1 to 3, 0.5 mg twice daily on days 4 to 7, then 1 mg twice daily from day 8. The label offers three ways to quit: set a quit date and start varenicline one week before it; start and then quit between days 8 and 35; or, for people sure they are not able or willing to quit abruptly, cut smoking by half within four weeks and by another half over the next four, aiming to stop completely by week 12. Treatment lasts 12 weeks, with another 12 weeks recommended for those who have quit; the gradual approach runs 24 weeks in all.

Chantix once carried a boxed warning about serious neuropsychiatric events; the FDA removed it in December 2016, after a neuropsychiatric safety trial that compared varenicline with bupropion, and a REMS is no longer required. The label still says to stop varenicline and contact a healthcare provider immediately if agitation, depressed mood, changes in behavior or thinking that are not typical, or suicidal thoughts or behavior occur. It also warns about seizures, a stronger effect of alcohol (patients are advised to drink less), accidental injuries including traffic accidents, cardiovascular events, sleepwalking, angioedema and allergic reactions, serious skin reactions and nausea. Nausea, abnormal or vivid dreams, constipation, gas and vomiting are the most common side effects. With severe kidney impairment the dose is lowered, and available data have not suggested an increased risk of major birth defects after exposure in pregnancy.

Pfizer recalled Chantix in 2021 because of an impurity, N-nitroso-varenicline, widening the recall in September 2021 to all lots of the 0.5 mg and 1 mg tablets; the FDA told patients to keep taking their medicine until their pharmacist provided a replacement or their doctor prescribed a different treatment. The first generic varenicline was approved in August 2021, and generics now come from many makers. Drugs@FDA lists Chantix as a current prescription product, and Pfizer’s DailyMed listing includes Chantix packs first marketed in September 2025. After the starting month pack, 1 mg tablets come in blister packs or bottles. Tyrvaya, a varenicline nasal spray labeled for the signs and symptoms of dry eye disease, is a separate product.

Taking Varenicline

How to take it

After eating, with a full glass of water (8 ounces), once a day on days 1 to 3 and then twice a day, morning and evening. Follow the quit-date approach your prescriber chose, with the education and counseling that go with it, and use caution driving or operating machinery until you know how it affects you.

If you miss a dose

Take the missed dose as soon as you remember it. If it is almost time for the next dose, skip the missed dose and continue your regular schedule; do not take a double dose.

Storage

In the container it came in, tightly closed, at room temperature away from excess heat and moisture (not in the bathroom), and out of reach of children.

Interactions to know about

Varenicline can increase the effects of alcohol. Quitting smoking can change how some drugs act, such as theophylline, warfarin and insulin, so their doses may need adjusting. With nicotine replacement, nausea, headache, vomiting, dizziness, indigestion and fatigue were more common.

This summarizes the official prescribing information. Your prescriber’s and pharmacist’s instructions, and the leaflet that comes with your medicine, take priority.

Why the cash price for Varenicline differs from pharmacy to pharmacy

Generic varenicline rated to Chantix comes from many makers, so quotes for the same supply differ by each pharmacy’s fee and markup and by whether varenicline is on its flat-price generic list. The starting month pack, blister packs and bottles are separate items, so a quote depends on what the prescription names, and a prescription that names Chantix and blocks substitution is filled with the brand.

Courses run 12 or 24 weeks, so quotes for a whole course differ with the length prescribed.

Ways to pay less for Varenicline without insurance

• Ask whether varenicline is on the pharmacy’s flat-price generic list, and compare more than one pharmacy.
• Check that the prescription allows a generic, unless the prescriber has a reason to require Chantix.
• Ask for the starting pack and the following weeks of 1 mg tablets to be quoted together, so the course is covered.
• If you have insurance, ask the plan how it covers smoking-cessation medicines before paying cash.
• Upload the prescription to Script Unlock so licensed pharmacies can quote their cash price. You pay the pharmacy directly.

Questions to ask your pharmacist about Varenicline

1. 1.How do I take the first week’s doses, and when is my quit date?
2. 2.What can I do about nausea or vivid dreams?
3. 3.Does my kidney function call for a lower dose?
4. 4.Which mood or behavior changes mean I should stop it and call?

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