Alcohol and Alcoholism Vol. 38, No. 4, pp. 321-326, 2003
© 2003 Medical Council on Alcohol
SUBNORMAL ALPHA-2-ADRENOCEPTOR-MEDIATED SEDATION DURING 6 MONTHS OF SOBRIETY IN MALE TYPE 1 ALCOHOL-DEPENDENT SUBJECTS
The Sahlgrenska Academy at Göteborg University, Institute of Clinical Neuroscience, Sahlgrenska University Hospital, Mölndal, SE 431 80 Mölndal and
1 Department of Psychology, Göteborg University, PO Box 500, SE 405 30 Göteborg, Sweden
Received 10 May 2002; first review notified 12 December 2002; accepted 10 February 2003
Aims: In the present study,
2-adrenoceptor function was investigated over 6 months of sobriety in eight male alcohol-dependent subjects. Methods: Subjects were investigated with repeated clonidine (CLON, 2 µg/kg body weight intravenously) challenge tests at days 1 and 7, and months 2 and 6 after the end of a period of heavy alcohol intake. CLON-induced sedation was rated at challenge tests. Mental well-being was self-reported before all challenge tests. Three challenge tests were performed at 1-week intervals in six male healthy controls. Results: Sedation was significantly lower after CLON at all time-points for the challenge tests in alcohol-dependent subjects compared with mean values for three challenge tests in controls. Three dimensions of mental well-being were negatively correlated with scores of CLON-induced sedation at month 6. Conclusions:
2-Adrenoceptor function is subnormal, as assessed by CLON-induced sedation, for at least 6 months after termination of alcohol intake. Whether this subnormal receptor function is pre-existing and possibly genetically determined or is a consequence of long-term alcohol intake must be further investigated, as should this receptor status in alcohol-dependent subjects with longer time-periods of sobriety.