Comparison of the Effect of Aminophylline, Magnesium Sulphate and Placebo in Prevention of Post Dural Puncture Headache in Parturient Undergoing Caesarean Section.

Inclusion Criteria: * All parturient who underwent cesarean section under spinal anesthesia. * Patients who are willing to participate in the trial gave an informed consent. * ASA physical status II. * The age ranged from 20 to 40. * Body Mass Index (BMI) ranged from 25 to 30 kg/m2. Exclusion Criteria: * Patient refusal. * Allergy to the studied drugs. * Patients with contraindications to spinal anesthesia. * Those with past history of chronic headache or recent onset of acute headache were excluded. * Women who had multiple punctures (\>2) during the spinal anesthesia procedure were excluded from the study. * Patients with advanced decompensated cardiac, renal, hepatic disease.