Efficacy of diclofenac transdermal patch versus injection as post-cesarean analgesia: A clinical, comparative, single-blind randomized control trial

Objectives: Post-operative pain is a common problem following cesarean delivery. The efficacy of topical application of diclofenac in alleviating pain has not been well established. We aim to evaluate the analgesic effect of transdermal diclofenac patch and compare it with the injectable form. Material and Methods: This is a prospective, randomized, single-blind, and placebo-controlled study. The study protocols and ethical considerations were adhered fully. Parturient women ( n = 90) undergoing cesarean section were randomized into two equal groups: the transdermal diclofenac patch (Group A) and the injectable diclofenac (Group B). The surgery was performed under spinal anesthesia. The participant’s demographic data, clinical data, pain relief data collected, compiled, and analyzed using the Statistical Package for the Social Sciences 20. The post-operative pain was scored using Visual Analog Scale. Pain relief scores were compared between the groups using Mann–Whitney U-test and Wilcoxon matched-pair test. Results: The participants match in demographic and clinical characters. The pain relief scores at 12 h was – 3.10 ± 0.74 and 3.04 ± 0.21 respectively while at 24 hours was – 2.48 ± 0.51 and 2.09 ± 0.29 respectively in Group A and Group B. The difference between Group A and Group B was statistically significant ( P = 0.0022). The pain relief scores in both groups match was statistically significant at 6–24 h and 6–48 h ( P = 0.0001, 0.0001). Conclusion: Diclofenac transdermal patch gives equal pain relief as that of routine injectable formulation.