Before taking gemfibrozil,
tell your doctor and pharmacist if you are allergic to gemfibrozil, any other medications, or any of the ingredients in gemfibrozil tablets. Ask your pharmacist for a list of the ingredients.
tell your doctor if you are taking dasabuvir (in Viekira Pak), simvastatin (Zocor, in Vytorin), or repaglinide (Prandin, in Prandimet). Your doctor will probably tell you not to take gemfibrozil while taking any of these medications.
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 any of the following: atorvastatin (Lipitor, in Caduet), bosentan (Tracleer), colchicine (Colcrys, Mitigare, in Col-Probenecid), dabrafenib (Tafinlar), enzalutamide (Xtandi), ezetimibe (Zetia, in Vytorin), fluvastatin (Lescol), glyburide (Diabeta, Glynase, in Glucovance), irinotecan (Camptosar, Onivyde), loperamide (Imodium), lovastatin (Altoprev), montelukast (Singulair), olmesartan (Benicar, in Azor, Tribenzor), paclitaxel (Abraxane, Taxol), pioglitazone (Actos, in Actoplus Met, Duetact, Oseni), pitavastatin (Livalo), pravastatin (Pravachol), rifampin (Rifadin, Rimactane, in Rifamate, Rifater), rosiglitazone (Avandia), rosuvastatin (Crestor), valsartan (Diovan, in Entresto, Exforge), and warfarin (Coumadin, Jantoven). Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Other medications may also interact with gemfibrozil, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list.
if you are taking colestipol (Colestid), take this medication 2 hours before or 2 hours after gemfibrozil.
tell your doctor if you have kidney, liver, or gallbladder disease. Your doctor may tell you not to take gemfibrozil.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking gemfibrozil, call your doctor.