Hello I appreciate your concern High random blood sugar and giddiness could be related to poor glycemic control and inadequate doses of glycomet In my opinion glimmer 1mg is better than glycomet If you can upload me more information, I will be able to guide you better Your age weight and height any associated co morbidity if any like obesity metabolic syndrome or thyroid and heart disease? I would advise you to get your HbA1c test for better assessment of sugar control You should continue other medicines as you are taking those have nothing much to do with diabetes strict dietary restrictions is recommended 1800 calories per day only you should yoga and meditation for better control of sugar and subsequently good health Hope this answers your question Best wishes