“…However, similar to withdrawal severity, the duration of withdrawal patterns are also variable. For example, increases in hunger and weight gain are the most persistent symptoms, lasting as long as 6 months to 1 year (Hughes, 1992;Klesges et al, 1997). In addition, individuals who quit using nicotinecontaining products do not always report increased anxiety; however, in cases where , anxiety is reported, it could be a function of brief lapses in their abstinence (e.g., periodically smoking one cigarette and then resuming abstinence west & Hajek, 1997).…”