What Causes Sudden Dizziness With Vertigo?
ER visit might help him...
Detailed Answer:
Hi,
Sudden onset dizziness upon standing seems like postural hypotension / orthostatic hypotension to me. Here, a sudden drop in blood pressure occurs as he stands resulting in dizziness. Usually postural hypotension is related to autonomic dysfunction which in turn is caused by long standing diabetes +/- high blood pressure.
Postural hypotension is rarely dangerous. However considering his age, severity of symptoms and the episode of vomiting, I will encourage you to take him to ER. His vitals including blood pressure recording as well as EKG / Echo might be necessary.
In a nutshell, ER visit will be good for him.
Hope this helps. Let me know if you need clarifications.
Regards