Effect of Artemisia Aucheri.L and Bupivacaine Encapsulated Nanoparticles on Nociceptive Pain.

AIM: The purpose of this study was to evaluate the antinociceptive interaction between bupivacaine and Artemisia aucheri. L encapsulated nanoparticles.

METHODS AND MATERIALS: The effect of bupivacaine and Artemisia aucheri.L alone, and their encapsulated co-administration was assessed using the 3% formalin test in rat. Increasing doses of bupivacaine (31.6, 100, 178, and 316 mg/kg) or Artemisia aucheri.L (5.6, 10, 17.8, and 31.6 mg/kg) were given i.p. 10 min before 3% formalin administration.

RESULTS: The possible mechanism(s) of action were analyzed for the encapsulated co-administration, naloxone (1 mg/kg) and N (G)-nitro-L-arginine methyl ester (L-NAME) (3 mg/kg) were used. Interaction index and isobolographic analysis and the demonstrated a synergistic effect. The experimental ED30 was lower as compared with theoretical ED30. Naloxone was shown to reduce the antinociceptive effect of the encapsulated co-administration.

DISCUSSION: These data suggest that the bupivacaine and Artemisia aucheri.L encapsulated nanoparticles gave a synergistic effect.