1. Biological basis of sex differences in drug abuse: preclinical and clinical studies

   • Wendy J. Lynch
   • Megan E. Roth
   • Marilyn E. Carroll

   Review Pages: 121 - 137

2. Genotype- and experience-dependent susceptibility to depressive-like responses in the forced-swimming test

   • Antonio Alcaro
   • Simona Cabib
   • Stefano Puglisi-Allegra

   Original Investigation Pages: 138 - 143

3. Blockade of ionotropic glutamatergic transmission in the ventral tegmental area reduces heroin reinforcement in rat

   • Zheng-Xiong Xi
   • Elliot A. Stein

   Original Investigation Pages: 144 - 150

4. Selective antagonism of the ataxic effects of zolpidem and triazolam by the GABA_A/α₁-preferring antagonist β-CCt in squirrel monkeys

   • Donna M. Platt
   • James K. Rowlett
   • Chunrong Ma

   Original Investigation Pages: 151 - 159

5. Acute effects of baclofen, a γ-aminobutyric acid-B agonist, on laboratory measures of aggressive and escape responses of adult male parolees with and without a history of conduct disorder

   • Don R. Cherek
   • Scott D. Lane
   • Joel L. Steinberg

   Original Investigation Pages: 160 - 167

6. Orphanin FQ/nociceptin blocks cocaine-induced behavioral sensitization in rats

   • Kabirullah Lutfy
   • Imran Khaliq
   • Nigel T. Maidment

   Original Investigation Pages: 168 - 176

7. Smokers deprived of cigarettes for 72 h: effect of nicotine patches on craving and withdrawal

   • Vincenzo Teneggi
   • Stephen T. Tiffany
   • Alan Bye

   Original Investigation Pages: 177 - 187

8. Effects of caffeine on mood and performance: a study of realistic consumption

   • Carolyn F. Brice
   • Andrew P. Smith

   Original Investigation Pages: 188 - 192

9. Decreased CCK_B receptor binding in rat amygdala in animals demonstrating greater anxiety-like behavior

   • Glen R. Wunderlich
   • Roger Raymond
   • Franco J. Vaccarino

   Original Investigation Pages: 193 - 199

10. Effects of buprenorphine on candy and sweetened fluid self-administration by rhesus monkeys

    • Sandra D. Comer
    • Suzette M. Evans
    • Richard W. Foltin

    Original Investigation Pages: 200 - 206

11. The discrimination of drug mixtures using a four-choice procedure in pigeons

    • D. McMillan
    • Mi Li

    Original Investigation Pages: 207 - 213

12. 5-HT_2C receptor mediation of unconditioned escape behaviour in the unstable elevated exposed plus maze

    • Nicholas Jones
    • Mark S. Duxon
    • Sheila M. King

    Original Investigation Pages: 214 - 220

13. Acute trytophan depletion decreases intensity dependence of auditory evoked magnetic N1/P2 dipole source activity

    • Seppo Kähkönen
    • Iiro P. Jääskeläinen
    • Jyrki Ahveninen

    Original Investigation Pages: 221 - 227

14. Intracortical excitability is modulated by a norepinephrine-reuptake inhibitor as measured with paired-pulse transcranial magnetic stimulation

    • Uwe Herwig
    • Kerstin Bräuer
    • Carlos Schönfeldt-Lecuona

    Original Investigation Pages: 228 - 232

15. Rosmarinic acid and caffeic acid reduce the defensive freezing behavior of mice exposed to conditioned fear stress

    • Hiroshi Takeda
    • Minoru Tsuji
    • Teruhiko Matsumiya

    Rapid Communication Pages: 233 - 235

16. Comments on the use of the startle reflex in psychopharmacological challenges: impact of baseline startle on measurement of fear-potentiated startle

    • C. Grillon
    • J. Baas

    Letter to the Editors Pages: 236 - 238

17. Alcohol self-administration, craving and HPA-axis activity: an intriguing relationship

    • Falk Kiefer
    • Holger Jahn
    • Klaus Wiedemann

    Letter to the Editors Pages: 239 - 240