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NEW YORK (Reuters Health) - Higher doses of Viagra (sildenafil) may impair the ability to smell, which is possibly related to an increase in nasal congestion, German researchers report in The Journal of Urology.
A team led by Dr. V. Gudziol at the University of Dresden Medical School studied 20 healthy, young male volunteers who received Viagra, at a 50- or 100-mg dose, or inactive "placebo" and then were exposed to an odor-dispensing device.
The researchers tested the subjects' odor detection threshold, odor discrimination and odor identification ability.
They found that the 100-mg dose caused a drop in smelling or "olfactory" ability, specifically odor discrimination and odor threshold, compared with placebo. The 50-mg dose, by contrast, had no effect on olfactory function.
http://news.yahoo.com/s/nm/20070117/hl_nm/viagra_smell_dc