Chronic subcutaneous THC and voluntary alcohol consumption, alone or when combined, differently affected caloric intake and weight gain (Experiment 1a: EtOH, n = 8; CTL, THC, & COM, n = 10/group). (A) EtOH & COM rats consumed similar doses of sweetened 10% alcohol. (B) Blood ethanol concentration (BEC) correlated with 1-h alcohol intake in the EtOH group. (C) BEC correlated with 3-h alcohol intake in the EtOH group, and with 3-h alcohol intake in the COM group after subcutaneous 10 mg/kg THC. (D) THC injection dose-dependently stimulated 3-h chow intake. Alcohol consumption reduced 3-h chow intake and blunted the hyperphagic effect of THC. THC vs. EtOH & COM: *p < 0.004; CTL vs. EtOH & THC: #p < 0.03.