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Varenicline is available as oral tablets in the following strengths:

• 0.5 mg
• 1 mg

Varenicline is used to help adults stop smoking. It works by reducing cravings and withdrawal symptoms, as well as decreasing the pleasure derived from smoking cigarettes. It is part of a comprehensive smoking cessation program that may also include education, counseling, and support.

Varenicline works by targeting nicotine receptors in the brain. It partially stimulates these receptors to reduce withdrawal symptoms and cravings, while also blocking nicotine from attaching to them. This helps reduce the satisfaction a person gets from smoking, making it easier to quit.

Varenicline is typically taken by mouth with a full glass of water, with or without food. The usual dosing schedule is as follows:

• Days 1-3: 0.5 mg once daily
• Days 4-7: 0.5 mg twice daily
• Day 8 onward: 1 mg twice daily

Treatment usually lasts for 12 weeks, but your healthcare provider may extend it based on your progress. You should choose a quit date, usually during the second week of treatment.

Always follow your healthcare provider’s instructions regarding how and when to take Varenicline. Do not change your dose without medical advice.

Varenicline is generally safe and effective for most people when used as directed, but it may not be suitable for everyone.

Do not take Varenicline if you:

• Are allergic to Varenicline or any of its ingredients
• Use with caution or speak to your doctor if you:
• Have a history of mental health conditions (such as depression, anxiety, or suicidal thoughts)
• Have kidney disease or reduced kidney function
• Are pregnant, planning to become pregnant, or breastfeeding
• Use alcohol regularly, as Varenicline may increase the effects
• Are taking other medications to help quit smoking

Always discuss your full medical history and current medications with your healthcare provider before starting Varenicline.

Common side effects of Varenicline include:

• Nausea
• Trouble sleeping (insomnia)
• Abnormal dreams or vivid dreams
• Headache
• Constipation
• Gas
• Vomiting

These side effects are usually mild and may decrease over time. If they persist or become bothersome, speak to your healthcare provider.

Serious side effects of Varenicline are not common, but you should seek immediate medical attention if you experience:

• Suicidal thoughts or behavior
• New or worsening depression, anxiety, or mood changes
• Aggressive or hostile behavior
• Chest pain or irregular heartbeat
• Seizures
• Allergic reactions (rash, swelling, itching, difficulty breathing)
• Serious skin reactions (e.g., Stevens-Johnson Syndrome)

If you or those around you notice changes in behavior, mood, or mental health while taking Varenicline, contact your healthcare provider right away.

Varenicline may interact with certain medications, although it has fewer known drug interactions than many other smoking cessation aids. However, you should still inform your doctor if you are taking:

• Nicotine replacement therapy (patches, gum, lozenges) – Using these with Varenicline may increase the risk of side effects such as nausea, headache, or dizziness.
• Alcohol – Varenicline may increase the effects of alcohol or alter your tolerance; use caution.
• Medications for mental health conditions – Varenicline may affect mood or behavior, especially when combined with antidepressants or antipsychotics.
• Seizure medications – Use with caution if you have a history of seizures or are taking seizure-lowering medications.

Always consult your healthcare provider or pharmacist before starting, stopping, or combining Varenicline with any other prescription, over-the-counter, or herbal product.

Various FDA-approved generic manufacturers

Varenicline is not recommended during pregnancy unless the potential benefit clearly outweighs the potential risk to the fetus. There is limited data on its safety in pregnant individuals, so always consult your doctor before using Varenicline if you are pregnant or planning to become pregnant.

• Chantix