Fig. 1.
Repeated ceftriaxone (CTX) inhibits antinociceptive tolerance to morphine (MOR). Data are expressed as mean % MPE ± S.E.M. determined 60 min following MOR administration on days 1, 4 and 7 of repeated MOR exposure. N = 6–8 rats/group. Panel A) *P < 0.05 compared to saline (SAL) + SAL. Panel B) +P < 0.05 compared to SAL + MOR.