4 doctors weighed in:
Why did I all of the sudden get lightheaded after smoking my first cigarette?
4 doctors weighed in

Dr. Alan Wartenberg
Addiction Medicine
3 doctors agree
In brief: Nicotine and hypoxia
Nicotine is a powerful drug, and lightheadedness from smooth muscle relaxation may occur even in experienced smokers who smoke more than usual, but is common (as is nausea and vomiting) with the initial exposure to cigarette smoke.
It also causes carbon monoxide to replace oxygen in red blood cells, and this can also result in dizziness or lightheadedness.

In brief: Nicotine and hypoxia
Nicotine is a powerful drug, and lightheadedness from smooth muscle relaxation may occur even in experienced smokers who smoke more than usual, but is common (as is nausea and vomiting) with the initial exposure to cigarette smoke.
It also causes carbon monoxide to replace oxygen in red blood cells, and this can also result in dizziness or lightheadedness.
Dr. Alan Wartenberg
Dr. Alan Wartenberg
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