“…Antianxiety and anticonvulsive medications (sometimes in combination) are used to treat obsessive-compulsive, avoidant, dependent, histrionic, paranoid, and borderline PDs (Bomstein, 1997b;Tuinier & Verhoeven, 1995). Antipsychotics are used to treat schizotypal, paranoid, schizoid, antisocial, borderline, and obsessive-compulsive PDs (Brinkley, 1993;Coccaro, 1993) The use of common treatment approaches for different PDs supports a cogent observation made by Widiger (1993): There is as much heterogeneity w i h n PD categories as there is between them. As Widiger noted, when DSM-III-R criteria are used there are 93 different symptom combinations that can lead to a diagnosis ofbor-derline PD, and 149,495,616 different symptom combinations that can lead to an antisocial P D diagnosis.…”