Hi, thanks for your question. I have gone through it and understand your concern. Short answer: Glipizide can cause dizzy spells in some patients because of its glucose-lowering action. This drug belongs to a group of medications called sulfonylureas which are notorious for hypoglycemia (low blood sugar). But before we hold this drug responsible for your problem, the following points should be considered; What is your usual blood glucose level (random and/or fasting)? Are you taking any other medications for diabetes? Have you recently increased the dose of Glipizide or another anti-diabetic medication? Have you checked your blood glucose level during the attack of dizziness? Do you take enough calories after taking this medication? There could be a wide range of causes of dizziness, the discussion of which is beyond the scope of this answer. Therefore, I would recommend that you consider the above-mentioned points and then see your doctor who will guide you on further management after clinically assessing you. Hope this helps, and please feel free to ask for clarification if there is any confusion.