Research has demonstrated that, overall, women are more vulnerable to drug addiction than men are. They become addicted more quickly after first using, they have a harder time staying off drugs, and they relapse at higher rates. But most studies have focused on men, and models that have been developed nearly entirely focus on male subjects. Now, two things are changing the situation: scientists are realizing that women's experience and women's brains are different when it comes to addiction, and the NIH has mandated that tests involve female subjects as well. Erin Calipari is assistant professor of pharmacology at the Vanderbilt University School of Medicine, and she's one of the authors of a new paper in the journal Neuropsychopharmacology. In it, she and her colleagues create a new model for examining the differences between female and male rodents when it comes to drug addiction.

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