- Blunted hormone responses to Ipsapirone are associated with trait impulsivity in personality disorder patients. Minzenberg, M.J., Grossman, R., New, A.S., Mitropoulou, V., Yehuda, R., Goodman, M., Reynolds, D.A., Silverman, J.M., Coccaro, E.F., Marcus, S., Siever, L.J. Neuropsychopharmacology (2006)