Your quick answer leads me to believe you didn't read the link, craft.
Dec. 14, 1999 (Atlanta) -- If you think smoking calms you down, think again. A study of thousands of smokers shows that they are three times more likely than nonsmokers to have panic attacks and panic disorder.
"We know already a whole lot about the effects of smoking on just physical health, and now we are also starting to see the adverse effects in new research on mental illness," study co-author Naomi Breslau, PhD, tells WebMD. "This is one example."
A panic attack can have all sorts of symptoms: shortness of breath, dizziness, heart palpitations, trembling, sweating, choking, nausea, numbness, flushes or chills, loss of one's sense of reality, chest pain, fear of dying, and/or fear of going crazy. People who have frequent panic attacks (more than four in a month) or have persistent fear of having another attack for a month after an attack suffer from panic disorder.
Breslau says, "It's not simply that the two things go together, but it's suggesting that smoking is playing a causal role." According to Breslau, smoking increases a person's lifetime risk of a panic attack by three to four times.