Before taking glipizide,
tell your doctor and pharmacist if you are allergic to glipizide, any other medications, or any of the ingredients in glipizide. Ask your pharmacist for a list of the ingredients.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention anticoagulants ('blood thinners') such as warfarin (Coumadin); aspirin and other nonsteroidal anti-inflammatory medications (NSAIDs) such as ibuprofen (Advil, Motrin) and naproxen (Aleve, Naprosyn); beta blockers such as atenolol (Tenormin), labetalol (Normodyne), metoprolol (Lopressor, Toprol XL), nadolol (Corgard), and propranolol (Inderal); calcium channel blockers such as amlodipine (Norvasc), diltiazem (Cardizem, Dilacor, Tiazac, others), felodipine (Plendil), isradipine (DynaCirc), nicardipine (Cardene), nifedipine (Adalat, Procardia), nimodipine (Nimotop), nisoldipine (Sular), and verapamil (Calan, Isoptin, Verelan); chloramphenicol; cimetidine (Tagamet); diuretics ('water pills'); fluconazole (Diflucan); hormone replacement therapy and hormonal contraceptives (birth control pills, patches, rings, implants, and injections); insulin or other medications to treat high blood sugar or diabetes; isoniazid (INH); MAO inhibitors such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate); medications for asthma and colds; medications for mental illness and nausea; miconazole (Monistat); niacin; oral steroids such as dexamethasone (Decadron, Dexone), methylprednisolone (Medrol), and prednisone (Deltasone); phenytoin (Dilantin); probenecid (Benemid); salicylate pain relievers such as choline magnesium trisalicylate, choline salicylate (Arthropan), diflunisal (Dolobid), magnesium salicylate (Doan's, others), and salsalate (Argesic, Disalcid, Salgesic); sulfa antibiotics such as co-trimoxazole (Bactrim, Septra); sulfasalazine (Azulfidine); and thyroid medications. Also be sure to tell your doctor or pharmacist if you stop taking any medications while taking glipizide. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have or have ever had G6PD deficiency (an inherited condition causing premature destruction of red blood cells or hemolytic anemia); if you have hormone disorders involving the adrenal, pituitary, or thyroid gland; or if you have heart, kidney, or liver disease. If you are taking the extended-release tablet, tell your doctor if you have short bowel syndrome (a condition where part of the intestine has been removed by surgery, damaged by disease, or you were born without part of your intestines); you have narrowing or a blockage of the intestines; or if you have ongoing diarrhea.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking glipizide, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking glipizide.
ask your doctor about the safe use of alcoholic beverages while you are taking glipizide. Alcohol may make the side effects of glipizide worse. Consuming alcohol while taking glipizide also rarely may cause symptoms such as flushing (reddening of the face), headache, nausea, vomiting, chest pain, weakness, blurred vision, mental confusion, sweating, choking, breathing difficulty, and anxiety.
plan to avoid unnecessary or prolonged exposure to sunlight and to wear protective clothing, sunglasses, and sunscreen. Glipizide may make your skin sensitive to sunlight.
ask your doctor what to do if you get sick, develop an infection or fever, experience unusual stress, or are injured. These conditions can affect your blood sugar and the amount of glipizide you may need.