Effectiveness: 22% (1 in 5)
Chantix (Champix in the UK) or varenicline tartrate is a new type of quit smoking pill that interferes with the brain chemistry interactions found in smokers. The varenicline stops nicotine working on the smoker so reducing their will to smoke (as there is no benefit/reward associated with smoking)
Chantix does have many side effects although most of them are the same as the side effects of nicotine withdrawal to a greater or lesser extent. The most significant side effects are nausea which is found in 15% of people on the low starting dose and 30% of people on the 1mg main dose. The other main side effects are insomnia and headaches.
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