Hi, The sudden onset of nausea, dizziness and chills that you are experiencing after smoking may be related to an adverse reaction to the tobacco or other chemicals in the cigarette. Some people may develop a sensitivity or allergy to certain substances in tobacco products over time, which can cause symptoms such as nausea, dizziness, and chills. Another possibility is that the symptoms you are experiencing may be related to a respiratory infection or other illness, which could be exacerbated by smoking. It is important to note that smoking is a known risk factor for many health problems, including respiratory infections, heart disease, and cancer. If you are experiencing persistent symptoms after smoking, it may be advisable to quit smoking altogether and seek medical attention to determine the underlying cause of your symptoms. There are many resources available to help you quit smoking, including nicotine replacement therapy, medications, and support groups. Your healthcare provider can also guide the best approach for quitting smoking and managing your symptoms. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician