A 69-year-old woman with a 10-year history of hypertension (HTN) on regular antihypertensive medication. Six hours before admission, while watching TV, she suddenly experienced numbness and fatigue in the right upper and lower limbs, dysarthria, drooling, headache, and vomiting once, followed by somnolence, prompting emergency admission. On arrival, BP was 195/105 mmHg (26/14 kPa). After confirming the diagnosis, the most appropriate management at this stage is: