
Concurrent bullatine A enhances morphine antinociception and inhibits morphine antinociceptive tolerance by indirect activation of spinal κ-opioid receptors
Keywords: ANOVA; analysis of variance; CFA; complete Freund's adjuvant; ED50; half-effective dose; Emax; maximum effect; GNTI; 5'-guanidinonaltrindole; HPLC; high performance liquid chromatography; LPS; lipopolysaccharides; NMDA; N-methyl-D-aspartate; STZ; strept