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Patient Education Monograph

Glipizide Tablet Oral

Pronounced

"GLIP-eh-zide"

Drug Interactions

See also How to Use section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Many drugs can affect your blood sugar, making it harder to control. Before you start, stop, or change any medication, talk with your doctor or pharmacist about how the medication may affect your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Tell your doctor right away if you have symptoms of high or low blood sugar. (See also Side Effects section.) Your doctor may need to adjust your diabetes medication, exercise program, or diet.

Beta-blocker medications (including metoprolol, propranolol, glaucoma eye drops such as timolol) may prevent the fast/pounding heartbeat you would usually feel when your blood sugar falls too low (hypoglycemia). Other symptoms of low blood sugar such as dizziness, hunger, or sweating are unaffected by these drugs.

  • Negative Interactions

    3

    • Glipizide

      Fenugreek

      Potential Negative Interaction

      In a randomized study of 15 patients with type 1 (insulin-dependent) diabetes, fenugreek (Trigonella foenum-graecum) (100 grams per day for ten days) was reported to reduce blood sugar, urinary sugar excretion, serum cholesterol, and triglycerides, with no change in insulin levels, compared with ten days of placebo. In a study of 60 people with type 2 diabetes, fenugreek (25 grams per day for 24 weeks) was reported to significantly reduce blood glucose levels. People using glipizide should talk with their doctor before making any therapy changes.

      Fenugreek
      Glipizide
      ×
      1. Sharma RD, Raghuram TC, Rao NS. Effect of fenugreek seeds on blood glucose and serum lipids in type I diabetes. Eur J Clin Nutr 1990;44:301-6.
      2. Sharma RD, Sakar A, Hazra DK, et al. Use of fenugreek seed powder in the management of non-insulin dependent diabetes mellitus. Nutr Res 1996;16:1131-9.

    • Glipizide

      Ginkgo

      Potential Negative Interaction

      This interaction is based on this drug belonging to a drug class. While this drug may differ from the text and references below, drugs within this class work in a similar way and this interaction is applicable to drugs within the same class.

      In a preliminary trial, administration of Ginkgo biloba who were taking oral anti-diabetes medication resulted in a significant worsening of glucose tolerance. Ginkgo did not impair glucose tolerance in individuals whose diabetes was controlled by diet. Individuals taking oral anti-diabetes medication should consult a doctor before taking Ginkgo biloba.

      Ginkgo
      Glipizide
      ×
      1. Kudolo GB. The effect of 3-month ingestion of Ginkgo biloba extract (EGb 761) on pancreatic beta-cell function in response to glucose loading in individuals with non-insulin-dependent diabetes mellitus. J Clin Pharmacol 2001;41:600-11.

    • Glipizide

      Gymnema

      Potential Negative Interaction

      Herbs such as Gymnema sylvestre will often improve blood-sugar control in diabetics.

  • Explanation Required

    1

    • Glipizide

      Magnesium

      Needs Explanation

      In a study of people with poorly controlled type 2 diabetes and low blood levels of magnesium, treatment with glipizide was associated with a significant rise in magnesium levels. In a randomized trial with eight healthy people, 850 mg magnesium hydroxide increased glipizide absorption and activity. In theory, such changes could be therapeutic or detrimental under varying circumstances. Therefore, people taking glipizide should consult with their doctor before taking magnesium supplements.

      Magnesium
      Glipizide
      ×
      1. McBain AM, Brown IR, Menzies DG, Campbell IW. Effects of improved glycaemic control on calcium and magnesium homeostasis in type II diabetes. J Clin Pathol 1988;41:933-5.
      2. Kivisto KT, Neuvonen PJ. Enhancement of absorption and effect of glipizide by magnesium hydroxide. Clin Pharmacol Ther 1991;49:39-43.

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Information expires December 2025.