A 65-year-old man was watching television 5 days ago when his wife noticed that the right side of his face was drooping, his speech was slurred and he could not move his right hand. This only lasted for 15 minutes. He did not seek any medical help at the time. He has no other medical problems and is not on any medication. His blood pressure is 125/85 mmHg and examination is unremarkable. Which is the single most appropriate management?