How does one smoke to giddy to return a responsibility recently

Recently, I feel dizzy after smoking. It is considered that my health is poor recently, such as recent overwork, poor rest or high blood pressure. After smoking, nicotine and other substances inside tobacco enter the human body, causing cerebral vasospasm, thus causing this symptom. At the same time, carbon monoxide and other substances in tobacco can also cause this symptom after inhalation.