Accidental dural puncture (ADP) resulting in accidental postdural puncture headache (PDPH) is the most significant source of morbidity for obstetric patients who choose to undergo neuraxial analgesia, which is the most effective modality for pain relief during labor. This study aims to compare the efficacy of two doses of neuraxial (either epidural or intrathecal) preservative-free morphine (PFM) to prevent headache after ADP in patients.