Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Experimental design for ICSS. Ten male Wistar rats were allowed to receive ICSS and to self-administer methamphetamine (0.05 mg/kg/injection) with 1-h access and then 6-h access and were withdrawn from methamphetamine for 37 days during which the rats were only allowed to receive ICSS. During the second exposure to methamphetamine self-administration with extended access, one rat was excluded because of a catheter failure
