Tell your doctor about all other cholesterol-lowering drugs you are taking with Niaspan ER, especially atorvastatin (Lipitor, Caduet), fluvastatin (Lescol), lovastatin (Mevacor, Altoprev, Advicor), pravastatin (Pravachol), or simvastatin (Zocor, Simcor, Vytorin, Juvisync).
Ask a doctor or pharmacist if it is safe for you to use Niaspan ER if you are also using any of the following drugs:
a blood thinner such as warfarin (Coumadin, Jantoven);
multivitamins or mineral supplements that contain niacin;
blood pressure or heart medications such as amlodipine (Norvasc, Caduet, Exforge, Lotrel, Tekamlo, Tribenzor, Twynsta, Amturnide), diltiazem (Cardizem, Cartia, Dilacor, Diltia, Diltzac, Taztia, Tiazac), felodipine (Plendil), nicardipine (Cardene), nifedipine (Procardia, Adalat), nimodipine (Nimotop), nisoldipine (Sular), or verapamil (Calan, Covera, Isoptin, Verelan); or
heart medications such as doxazosin (Cardura), isosorbide (Dilatrate, Imdur, Isordil, Monoket, Sorbitrate), nitroglycerin (Nitro-Bid, Nitro-Dur, Nitrostat), prazosin (Minipress), or terazosin (Hytrin).
This list is not complete and other drugs may interact with Niaspan ER. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.
 Niaspan drug interactions (more detail)
