Hello Doctors, I have been noticing that for the past 6 months or so that almost every time I smoke a cigarette I get an urge to vomit. This occurs half way though the cigarette and results in dry heaving. I have been a smoker for about 15 years and this has only been happening for about 6 months or so. The dry heaving is not accompanied by actual nausea, sweating, or other symptoms associated with vomiting. However, I have never vomited, just uncontrollable dry heaves. Thank you for your time.