Hi,
Definitely the symptoms you have described could be due to the drug you are having(which can cause dizziness, insomnia, vertigo, nausea, nervousness, headache) or the problem could also be due to some digestion.
Problems(acidity+some more problem) could also be due to lack of physical activity or some neurological problem(which I don't think right now that you are having.),with the history you gave me.
You did not tell me about whether you are obese or not,if yes then you are recommended ...
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