A prospective comparative evaluation of gabapentin vs pregabaline for the acute post-operative pain management in lower limb surgeries under spinal anaesthesia

Background: Pre emptive analgesia is multimodal approach where drug is used before surgery and has potential to be more effective than a similar analgesic treatment initiated after surgery. Pregabaline and Gabapentin are GABA analogue used is used as pre-emptive analgesic. Its analgesic action is mediated through α2δ subunit of voltage gated calcium channels on dorsal horn neurons. Material and Method:96 patients satisfying selection criteria were enrolled for this study and divided in to three groups Group P, Group G and Group C each having 32 patients. All patients were explained about visual analogue score. Result: There is significant difference between three groups regarding time of first rescue analgesia and tramadol consumption. The mean time for rescue analgesia was longer in pregabaline group then gabapentin group (482.7±113.5 min vs 343.35±70.74 min). The mean amount of dose of tramadol requirement was also less in pregabaline and gabapentin group (164.32±39.41 vs178.32±48.21 vs 272.82±83.01) in comparison control. Conclusion: The VAS score was significantly higher in control then pregabaline and gabapentin group. Both pregabaline (group P) and gabapentin (group G) are comparable to each other regarding VAS score at different time interval in post operative period. Ramsay sedation score was significantly higher in pregabaline and gabapentin group up 4 hour post operatively but after that there was no significant difference between two groups. Both pregabaline (group P) and gabapentin (group G) are comparable to each other regarding Ramsay sedation score at different time interval in post operative period.