Feeling weak, sleepy or low specifically after lunch, while on a
diabetes medicine, usually points to one of two things â a post-meal fall in
sugar (reactive hypoglycaemia) or a sharp sugar spike after a heavy carbohydrate meal. The only way to know which is to check your glucose with a glucometer at the moment you feel low, and again 2 hours after that meal, and note it down for a week. Please do not increase, reduce or stop your tablet on your own. In the meantime, keep lunch smaller and split it, cut down rice/maida in that meal, add protein and vegetables, and never skip breakfast. Take a short 10-minute walk after lunch rather than sitting or sleeping.
Next Steps
Maintain a one-week record of glucose readings (fasting, when symptomatic, and 2 hours after lunch) along with
HbA1c, and get haemoglobin,
thyroid and
vitamin B12/D checked, since anaemia and thyroid issues also cause this. Bring these to a review so the dose and timing of your medicine can be adjusted properly. You can book a teleconsult with me on Practo with these reports, or see me at Synergy Multispeciality Hospital, Miraj (consultation fee Rs 100).