Several are possible, taking into account the special needs of each smoker. If dependence is important the 2 mg gum may not allow sufficient nicotine replacement. It is then necessary to use the 4 mg gum or the patches. With the transdermal systems nicotine replacement is greater in extent , more regular and can be modulated according to need. However, NRT are not always able to suppress nicotine withdrawal symptoms.
Cardiovascular risks appear to be low.
It is difficult to isolate the active ingredient and to collect homogeneous data because of the variability in practice. Nevertheless, some controlled studies argue in favour of these methods. In France, behavioural therapy is not very popular. For all these methods it is particularly difficult to dissociate the influence of empathy towards the patients from the specific effect of the intervention. Although individual impact of minimal intervention is low, with widespread application it can help to increase the proportion of successful quitting attempts.