Thank you for your medical query at AsktheDoctor.com
I understand your concern.
If you were a chain smoker and you quit suddenly the withdrawal symptoms would be tremors, palpitations, insomnia, gastritis, which can lead to nausea.
I will advise you to take Cap. Omeprazole 20 mg twice daily for a week, and Tab. Ondansetron 4 mg to be taken once before every meal for 3-5 days. This will reduce your nausea.
Hope this was helpful,
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