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Oral medication

Champix is a prescription-only medicine containing varenicline which is used by adults to help them to stop smoking. It doesn’t contain any nicotine, instead it blocks the action of nicotine in your brain to reduce the enjoyment that you get from smoking, which means that a cigarette won’t satisfy you in the same way and also helps to reduce your cravings and withdrawal symptoms.

Medication effect duration

Champix is a 12-week course of treatment. You start taking one tablet daily, then increase to twice as day as you move through the course. It can be associated with some side effects that can cause altered mood and depression, so you must discuss any previous symptoms you may have had with our doctors and look out for any changes in your moods through your quit attempt.

 Nutrition information for medication

When you begin a quit attempt with Champix, it will still take willpower. Removing all your smoking cues, such as ashtrays, lighters, half used packets, is essential. Changing your routine around, so that you don’t slip back into old habits, is also good tip. So, after your evening meal if you usually smoke, try taking the dog for a walk instead or move into a different room. If you love nothing more than a cigarette with a coffee, order a tea or soft drink.

How long does it take Champix to work?

It is recommended that you complete a 12-week course of Champix treatment. Your first prescription will be for a 2-week starter pack. During the first week of treatment, you take a lower dose of Champix. After this, you will move onto maintenance packs for the remaining weeks.

Partway through your 12 weeks you may feel that you are doing well, and haven’t smoked or wanted to smoke, but it is still advisable that you continue until the end of the full 12 weeks. The longer you stay on treatment, the greater the chance of successfully quitting. Completing the 12-week treatment course can increase your chance of quitting by more than 10 times, compared to people who complete up to 2 weeks of treatment3.

How do I take Champix?

Champix tablets should be swallowed whole with water and can be taken with or without food.Before starting your course of Champix, you should decide on your quit date. The date should ideally be between day 8 and day 14 of treatment. If you are not willing or able to set a target quit date within 2 weeks of starting treatment, you should choose a target quit date within 5 weeks. It’s a good idea to write this date on your pack as a reminder.

Champix comes as a 0.5mg white tablet and a 1mg light blue tablet. You start with the white tablet and then usually go to the light blue tablet.

Week 1

  • Day 1 to 3 – take one white Champix 0.5 mg tablet once a day
  • Day 4 to 7 – take one white Champix 0.5 mg tablet twice daily, once in the morning and once in the evening, at about the same time each day

Week 2

  • Day 8 to 14 – take one light blue Champix 1 mg tablet twice daily, once in the morning and once in the evening, at about the same time each day

Week 3 to 12

  • Day 15 to end of treatment – take one light blue Champix 1mg tablet twice daily, once in the morning and once in the evening, at about the same time each day

After 12 weeks of treatment, if you have stopped smoking, our doctors may recommend an additional 12 weeks of treatment with Champix 1 mg film-coated tablets twice daily to help avoid returning to smoking.

If you are not able or willing to quit smoking straight away, you should reduce smoking during the first 12 weeks of treatment and quit by the end of that treatment period. You should then continue to take Champix 1 mg film-coated tablets twice daily for a further 12 weeks resulting in a total of 24 weeks of treatment.

We may adjust your dose if you have other conditions or if you find you are experience other side effects. Always take this medicine exactly as our doctor has told you.

What happens if I take more tablets that I was supposed to, or I miss a dose?

It can be dangerous if you take more Champix than you have been prescribed. If you do take more Champix than you should, seek medical advice immediately. Remember to take your Champix box with you, so the medical staff know what you have taken.

You should try to take your Champix regularly at the same time each day. If you forget to take a dose, take it as soon as you remember. If, it is within 3-4 hours before your next dose, do not take the tablet that you have missed. You should never take a double dose to make up for a forgotten tablet.

Is it safe to buy Champix online?

While many online retailers claim to supply genuine medicines, they may be unregulated, provided without a genuine doctor consultation and potentially very dangerous. You can rest assured, PrivateDoc is a fully registered digital health service. We have UK registered doctors that review and assess every consultation. All the medicines we supply are 100% genuine and fully regulated by the Medicines and Healthcare products Regulatory Agency (MHRA).

Special considerations when taking Champix

Champix should not be used if you are:

  • allergic to varenicline or any of the other ingredients in Champix
  • under 18 years old, as the evidence doesn’t support its use in adolescents
  • pregnant or breastfeeding

There are some special considerations that you and our doctors need to consider before starting you on treatment:

  • Depression and suicidal thoughts

There have been reports of depression, suicidal thoughts and behaviour and suicide attempts in patients taking Champix. If you are taking Champix and develop agitation, depressed mood, changes in behaviour that are of concern to you or your family or if you develop suicidal thoughts or behaviours you should stop taking Champix and contact your GP immediately. It is also important you let our doctors know this information.

  • The effects of stopping smoking

When you stop smoking, whether you are using Champix or not, it can affect how your body processes other medicines that you may take.

Stopping smoking itself, with or without treatment, has also been associated with an increased risk of experiencing changes in thinking or behaviour, feelings of depression and anxiety, and can be associated with a worsening of psychiatric disorder. If you have a history of psychiatric disorder you should discuss this with us.

  • Heart symptoms

New or worse heart or blood vessel (cardiovascular) problems have been reported primarily in people who already have cardiovascular problems. Tell our doctor if you have any changes in symptoms during treatment with Champix. Get emergency medical help right away if you have symptoms of a heart attack or stroke or feel concerned about your symptoms.

  • Seizures

Tell us if you have experienced seizures or have epilepsy before your start Champix treatment.

  • Hypersensitivity reactions

Stop taking Champix and tell your GP immediately if you experience any of the following signs and symptoms that may indicate a serious allergic reaction: swelling of the face, lips, tongue, gums, throat or body and/or difficulty breathing, wheezing.

  • Skin reactions

Potentially life-threatening skin rashes (Stevens-Johnson syndrome and Erythema Multiforme) have been reported with the use of Champix. If you develop a rash or if your skin starts to peel or blister you should stop taking Champix and seek emergency medical help.

  • Other medicines and Champix

Tell us if you are taking, have recently taken or might take any other medicines as an adjustment of the dose of other medicines may be necessary. If you have severe kidney disease you should avoid taking cimetidine (a medicine used for gastric problems) at the same time as this may cause increased blood levels of Champix.

  • Use of Champix with other therapies for smoking cessation

Consult our doctor before using Champix in combination with another smoking cessation therapies.

  • Champix with food and drink

There have been some reports of increased intoxicating effects of alcohol in patients taking Champix. However, it is not known if Champix actually increases alcohol intoxication.

  • Driving and using machines

You should not drive, operate complex machinery or engage in any other potentially hazardous activities if Champix affects your ability to perform these activities

What are the side effects associated with Champix?

Like all medicines, this medicine can cause side effects, although not everybody gets them. Giving up smoking, with or without treatment, can cause various ‘withdrawal’ symptoms. These could include changes of mood (like feeling depressed, irritable, frustrated or anxious), sleeplessness, difficulty concentrating, decreased heart rate and increased appetite or weight gain.

Most of these withdrawal side effects are mild or moderate, and will reduce in time however, you should be aware of the possible emergence of serious neuro psychiatric symptoms, such as agitation, depressed mood, or changes in behaviour during a quit attempt with or without Champix and you should contact a doctor or pharmacist if you experience such symptoms.

Other side effects include:
Very common (affects more than 1 in 10 people)

  • Chest infection, inflammation of the sinuses
  • Abnormal dreams
  • Difficulty sleeping
  • Headache
  • Nausea

Common (may affect up to 1 in 10 people)

  • Inflammation of the nose and throat
  • Increased weight, decreased appetite, increased appetite
  • Sleepiness, dizziness, changes in the way things taste
  • Shortness of breath, cough
  • Heartburn, vomiting, constipation, diarrhoea, feeling bloated, abdominal pain, toothache, indigestion, flatulence, dry mouth
  • Skin rash, itching
  • Joint ache, muscle ache, back pain
  • Chest pain, tiredness

Uncommon (may affect up to 1 in 100 people)

  • Fungal infection, viral infection
  • Feeling of panic, difficulty thinking, restlessness, mood swings, depression, anxiety, hallucinations, changes in sex drive
  • Seizure, tremor, feeling sluggish, less sensitive to touch
  • Conjunctivitis, eye pain
  • Ringing in the ears
  • Angina, rapid heart rate, palpitations, increased heart rate
  • Increased blood pressure, hot flush
  • Inflammation of nose, sinuses and throat, congestion of nose, throat and chest, hoarseness, hay fever, throat irritation, congested sinuses, excess mucous from nose causing cough, runny nose
  • Red blood in stools, irritated stomach, change of bowel habit, belching, mouth ulcers, pain in the gums
  • Reddening of the skin, acne, increased sweating, night sweats
  • Muscle spasms, chest wall pain
  • Abnormally frequent urination, urination at night
  • Increased menstrual flow
  • Chest discomfort, flu like illness, fever, feeling weak or unwell
  • High blood sugar
  • Heart attack
  • Suicidal thoughts
  • Changes in thinking or behaviour (such as aggression)

Rare (may affect up to 1 in 1,000 people)

  • Excessive thirst
  • Feeling unwell or unhappy, slow thinking
  • Stroke
  • Increased muscle tension, difficulty with speech, difficulty with coordination, reduced sense of taste, altered sleep pattern
  • Disturbed vision, eyeball discolouration, dilated pupils, sensitivity to light, short-sightedness, watery eyes
  • Irregular heartbeat or heart rhythm disturbances
  • Throat pain, snoring
  • Blood in vomit, abnormal stools, coated tongue
  • Stiff joints, rib pain
  • Glucose in urine, increased urine volume and frequency
  • Vaginal discharge, changes in sexual ability
  • Feeling cold, cyst
  • Diabetes
  • Sleep walking
  • Loss of contact with reality and unable to think or judge clearly (psychosis)
  • Abnormal behaviour
  • Severe skin reactions including Erythema Multiforme (a type of rash) and Stevens-Johnson Syndrome (a serious illness with blistering of the skin, mouth, around the eyes or genitals)
  • Serious allergic reactions including angioedema (swelling of the face, mouth, or throat)

Not known
Very common (affects more than 1 in 10 people)

  • Transient loss of consciousness