It has been found that 30% of the smokers who take Champix experience nausea and constipation as major varenicline side effects. Sleeping problems and unusual dreams are other psychiatric varenicline side effects which are reported time to time. However, these varenicline side effects are not severe enough to quit taking Champix. 
Most of the above Champix side effects are not serious in nature. Also it does not mean all those who take Champix will have varenicline side effects.
If any of the Champix side effects become serious or bothersome, contact your doctor immediately. Do not start or stop Champix treatment abruptly without consulting your doctor.
The following list of Champix side effects is actually for health professionals. So don’t get alarmed when you read the long list of Champix side effects. The only varenicline side effects you may experience are nausea, constipation, fatigue, sleeping problems and weird dreams. Most people using Champix report having no or few minor varenicline side effects which are tolerable and generally not worrisome.
Most people taking Champix report to have unusual dreams and vomiting as their varenicline side effects. Apart from these, there are not many Champix side effects reported.
Gastrointestinal side effects of Champix
- Nausea
- Abdominal Pain
- Flatulence
- Dyspepsia
- Vomiting
- Constipation
- Salivary Gland Conditions
- Dry mouth
Psychiatric Disorders
- Sleep Disorder
- Insomnia
- Abnormal dreams
- Sleep disorder
- Nightmares
Champix Side Effects on Nervous System
- Headache
- Neurological Disorders
- Dysgeusia (taste disorder)
- Somnolence
- Lethargy and fatigue
Apart from the above Champix side effects, certain Champix side effects arise due to improper dosage or taking contraindicated drugs. For instance, if you take NRT with Champix, there is a significant decrease in average systolic blood pressure. Varenicline side effects such as nausea, headache, vomiting, dizziness, dyspepsia and fatigue may also occur.
- Some of the Champix side effects are dizziness and somnolence which makes it unfeasible and dangerous to drive or operate machinery while on Champix.
- The best part is Champix is not affected by or affects food and herbal medications. You are not likely to have Champix side effects arising from food or herb indications. However, before you take any herbal or alternative medications while on Champix inform your doctor to avoid Champix side effects. Champix side effects on metabolism can cause changes in appetite.
Some of the rare varenicline side effects include allergic reactions such as redness, itching or swelling of your skin, hives, burning, stinging, or any other skin problems, swelling of the neck area or any difficulty with breathing. If these are not present before using Champix, they should be immediately informed to the doctor.
You might also face some problems on account of smoking cessation; these might not necessarily be Champix side effects. Don’t stop taking Champix without first determining if your problem is actually a varenicline side effect.
Buy Champix! Don’t worry about the varenicline side effects. Champix side effects are so less and rare that it’s a win-win situation for you.
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