Clonidine/labetalol/yohimbine
Progression of underlying hypertension leading to refractory hypertensive urgency, and lack of effect of clonidine and labetalol: case report-
Serious
An event is determined to be serious (based on the ICH definition) when the patient outcome is:
death
life-threatening
hospitalisation
disability
congenital anomaly
other medically important event