Evaluation of the Preventive Effects of Neostigmine Plus Atropine on Post-Dural Puncture Headache.

Background: Post-dural puncture headache (PDPH) is one of the most common side effects of spinal anesthesia. Several strategies and drugs have been suggested for the treatment and/or prevention of this headache. The aim of this study is evaluating the effects of intravenous prescription of neostigmine plus atropine 15 minutes after dural puncture on incidence and severity of PDPH during 5 days of follow-up in the setting of lower limb orthopedic surgeries. Materials and Methods: In a randomized, controlled, double-blind clinical trial, 99 patients of lower limb orthopedic surgeries were randomized into study (49 patients) and control groups (50 patients). Fifteen minutes after dural puncture, participants in the two groups intravenously took neostigmine (40 µg/kg) plus atropine (20 µg/kg) and placebo (normal saline), respectively. Side effects of the studied drugs and incidence, severity, and duration of PDPH were evaluated 5 days after surgery. Results: A total of 20 patients in the study group and 31 in the control group showed a headache-with-PDPH profile during 5 days of follow-up (P-value = 0.035). The mean duration of PDPH was 1.15 ± 0.48 and 1.32 ± 0.54 days in the study and control groups, respectively (P-value = 0.254). Conclusion: Preventive administration of 40 µg/kg neostigmine plus 20 µg/kg of atropine may be effective in reducing the incidence and severity of PDPH after spinal anesthesia in lower limb orthopedic surgeries.