Another gender difference?

From http://www.sciencedaily.com/releases/2006/10/061009031253.htm
Drug May Help Women Stop Smoking
Adding the opiate blocker naltrexone to the combination of behavioral therapy and nicotine patches boosted smoking cessation rates for women by almost 50 percent when assessed after eight weeks of treatment, but made no difference for men, report researchers from the University of Chicago in the October 2006 issue of the journal Nicotine and Tobacco Research.
Naltrexone helped reduce the craving for cigarettes and lessened the discomforts of withdrawal for women in the study. It also reduced the weight gain often experienced by men and women in the first month after quitting.
"Women have historically had less success than men in giving up cigarettes," said study author Andrea King, Ph.D., associate professor of psychiatry at the University of Chicago. "In this small study, naltrexone seems to have closed that gap."
See also:
http://health.yahoo.com/news/167458
which says that colamay be bad for women and
http://www.discover.com/issues/oct-06/rd/genetic-sex-differences/
about gender differences in the mice which suggests that different medicines may have to be developed foe men and women.