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| Methods | Double‐blind, randomly assigned clinical trial |
| Participants | 60 patients (ASA I‐II) with PDPH after spinal anaesthesia for gynaecological or urological intervention in Iran |
| Interventions | Propranolol compared with acetaminophen |
| Outcomes | Pain severity measured by visual analogue scale |
| Notes | 2012 conference abstract. Email sent asking for more information |
