Its kind of hard to have a go at this without seeing an ECG, i mean it is possible that the adenosine was given in error.
Having said that, the last haemorrhagic stroke i was directly involved in became agitated, B/P went to 240/140, SVT in the 160's, cheyne stoking and then brady'd out to an idioventricular rhythm of 20 in space of about 3 minutes, but that was a very samll time frame in the 2+ hours they had been symptomatic.
I have no idea what the territory is on beta blockers / nitrates / anti hypertensives in acute haemorhagic stroke, i imagine that messing with a hypertension thats supporting CPP is counter productive, but that is nothing more than a guess
I cant remember what the other guys said for management, but of they're agitated ill manage for pain as well as the usual stuff.