A 76 year old woman is seen in A&E, where she describes a 30 minute episode of right sided facial weakness and slurred speech occurring several hours ago which has now resolved. She has a background of COPD but no other health problems. She is takes inhalers only. On examination, there is no neurological deficit, her BP is 130/85, and her ECG is unremarkable. Which of these would not be appropriate as part of the initial management plan?