Background: Cigarette smokers with a history of major depression are a
t risk for developing depressive mood when they attempt cessation. Whe
ther cessation can also provoke more severe depressions, however, has
not been well documented. Method: Six case reports of severe depressiv
e episodes after smoking cessation are described. Results: Four cases
occurred among smokers with a history of major depression but who were
not depressed at the time of cessation. Two cases involved smokers wi
th no previous history of major depression. Variability in both the ti
ming and the outcome of the postcessation depressions was observed. Co
nclusion: The risk that depressive states may emerge or be exacerbated
after smoking cessation, particularly in patients with a history of m
ajor depression, must be kept in mind in the treatment of nicotine dep
endence.