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A new study says that as exposure to cigarette fumes increases among nonsmokers, so does their risk of developing serious psychological distress and of being hospitalized for mental ailments. New evidence also suggests that nonsmokers who inhale high levels of secondhand smoke may experience nearly as much psychological distress as smokers. Viagra usage overall viagra usage, these findings support the view, viagra usage largely based on animal studies, that nicotine administered in large enough doses can induce sadness and other negative moods. A 2006 federal report estimated that 60 percent of nonsmokers in the [viagra usage] United States display biological signs of having ingested at least low levels of nicotine via cigarette smoke.


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