Q. Will the food taken in the previous night affect fasting blood sugar?

Answered by
Dr. Divakara P
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Dec 31, 2016 and last reviewed on: Nov 20, 2020

Hi doctor,

I am 48 years old and I have not been diabetic till now. Three months ago, my blood pressure readings were higher than usual and my doctor changed my medicines (Omnitan-H 20 mg and Amlopin-M 20 mg to Olmetrack 40 mg and Lnbloc 10 mg). I took the new medicines for some time, but they did not suit me as I had white coat hypertension and I stopped taking them with the consent of another doctor and returned to the older ones. He gave me some new medicines (Zevit, Clonafit Beta and Antoxid) to treat the anxiety and nervous weakness issues caused by the hypertension medicines. I have read that the side effect of these medicines is high blood sugar. I went for an early morning fasting blood sugar test last week, I had taken a glass of milk before sleeping and I took fenugreek water and garlic in the morning to lower my blood pressure. I had also been eating some sugarcane for a week before the test. My blood sugar was diagnosed to be 126 mg/dL. Is this because of the medicines and above factors? Or am I in the risk of being diabetic now?



Welcome to icliniq.com.

  • First of all, I need to tell you that whether the cause is a medicine or your lifestyle the value of your fasting blood sugar 126 mg/dL falls into the diabetic range.
  • You are eating sugarcane or garlic or fenugreek water previous night does not affect your blood sugar level.
  • Now coming to the medications that you were taking, Clonafit beta (Clonazepam and Propranolol) can cause diabetes, but again the chances are less when compared to you having diabetes by yourself.
  • However, I suggest you stop Clonafit. Also, get one more test called HbA1C, which shows your 90 days average blood sugar and based on which I can tell you that are you already diabetic or at risk of diabetes.

Revert back with the report to a diabetologist online --> https://www.icliniq.com/ask-a-doctor-online/diabetologist

Sir, I forgot to mention that I was also taking Optiwomen multivitamin which contains Niacin.
I went for the HbA1c test and my HbA1c level is 171mg/dL or 7.6%. You told that 126mg/dL falls in diabetic range, have these medications (clonafit) and lack of physical activity during illness 3 months ago led to diabetes. Can it now be cured without taking medicines? I am now back to my schedule of walking 4.5 km daily.
# HI

Your HBA1c is also in the diabetic range . In my opinion it is better that you are started on medications to bring down blood sugars. I would recommend Tab Metformin 500mg once a day in morning and later ( after 2 months ) seeing the blood sugar levels we shall decide to stop medication.

It could be due to medication or it could have happened by itself but whatever is the cause I recommend you to start Metformin and also stop Clonafit beta.


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