Given the above, it is tempting to speculate that elimination of acetaldehyde in the saliva during cigarette smoking by L-cysteine sucking tablets, might effectively block (or reduce) the formation of harmans, reduce their high blood levels, and thus alleviate the acetaldehyde-enhanced nicotine addiction (by reducing MAO-inhibition) among smokers. The present study is designed to validate the novel hypothesis that regular use of Acetium lozenges in context with smoking is an effective intervention for cessation of cigarette smoking.