Post-dural puncture headache (PDPH) is a common and often debilitating complication of spinal or epidural procedures involving dural puncture. It typically results from cerebrospinal fluid (CSF) leakage, which leads to decreased intracranial pressure and traction on the meninges (which are very sensitive). PDPH generally presents within a few-days post puncture.  It is characterized by a severe, positional headache that worsens when the patient is upright. This condition most frequently occurs in obstetric patients after an accidental dural puncture during epidural anesthesia. While an epidural blood patch (EBP) is the gold standard for treatment, the discomfort and functional impairment caused by PDPH highlight the importance pf effective preventive strategies. In addition to mechanical and procedural techniques, such as the use of smaller or atraumatic needles, pharmacologic prophylaxis has been investigated, with cosyntropin demonstrating potential use preventively during epidural anesthesia.

Cosyntropin, a synthetic form of adrenocorticotropic hormone (ACTH), stimulates the secretion of cortisol and aldosterone from the adrenal glands, thereby increasing sodium and water retention (1). This physiological effect increases intravascular and CSF volume and may boost CSF production, which helps offset the pressure loss associated with dural puncture. Cosyntropin may also stabilize vascular tone, which reduces the compensatory cerebral vasodilation that is thought to contribute to PDPH after epidural anesthesia. These combined mechanisms provide a logical rationale for its use as a preventive agent.

Early clinical evidence supported this theory. In a randomized trial, Hakim et al. found that a single intravenous dose of cosyntropin administered after an accidental dural puncture in obstetric patients significantly reduced the incidence of postdural puncture headache (PDPH) compared with no prophylaxis. Patients who received cosyntropin experienced a delayed onset of symptoms and required fewer EBPs than those in the control group. These results sparked interest in cosyntropin as a simple, safe preventive intervention.

However, more recent data have been inconclusive. A large retrospective analysis by Ellis et al. (2024) found no significant reduction in PDPH incidence or EBP use among patients who received prophylactic cosyntropin after an unintentional dural puncture compared to those who did not (3). Similarly, a multicenter study by Pancaro et al. (2023) reported that cosyntropin did not meaningfully decrease PDPH rates in parturients following accidental dural puncture (4). These results suggest that, although the drug’s mechanism is biologically plausible, its real-world benefit may be limited or context dependent.

Differences between studies likely reflect variations in sample sizing, dosing, and study design. Earlier trials were small and tightly controlled, while later studies included larger, more heterogeneous patient populations. This variability complicates interpretation and highlights the need for further randomized trials with standardized dosing protocols. Currently, systematic reviews conclude that the evidence supporting the routine use of prophylactic cosyntropin in clinical practice is insufficient.

Overall, the current evidence indicates that, although cosyntropin has theoretical potential for preventing PDPH after dural puncture from epidural anesthesia, its practical effectiveness is uncertain. Until large-scale studies clarify its role, the focus of PDPH prevention should be on procedural vigilance, optimal needle selection, and early recognition of dural puncture. Cosyntropin may be considered for select high-risk cases, but it should not yet be regarded as a standard prophylactic measure.

References

1. Bradbury CL, Singh SI, Badder SR, Wakely LJ, Jones PM. Prevention of post-dural puncture headache in parturients: a systematic review and meta-analysis. Acta Anaesthesiol Scand. 2013;57(4):417-430. doi:10.1111/aas.12047

2. Hakim SM. Cosyntropin for prophylaxis against postdural puncture headache after accidental dural puncture. Anesthesiology. 2010;113(2):413-420. doi:10.1097/ALN.0b013e3181dfd424

3. Ellis E, Salloum J, Hire M, McCarthy RJ, Higgins N. Prophylactic cosyntropin after unintentional dural puncture and incidence of post-dural puncture headache and epidural blood patch use: A retrospective cohort study (2019-2022). Int J Obstet Anesth. 2024;60:104262. doi:10.1016/j.ijoa.2024.104262

4. Pancaro C, Balonov K, Herbert K, et al. Role of cosyntropin in the management of postpartum post-dural puncture headache: a two-center retrospective cohort study. Int J Obstet Anesth. 2023;56:103917. doi:10.1016/j.ijoa.2023.103917