The group's manager, Allen Kovac, reveals Neil had been experiencing health problems "for the last few days" prior to his hospitalisation and he remains under doctors' care as they decide upon the best form of treatment.
However, the singer is determined to honour Motley Crue's tour commitments and the band is still scheduled to take its show with Kiss and Thin Lizzy to Brisbane on Tuesday (12Mar13).
Kovac tells CNN.com, "Vince is a warrior, who has played shows through a wide ranging list of injuries. If there is a way to safely perform, he always does. In nearly 20 years of managing Motley Crue, I can't recall a show the band has cancelled."