Drug Interactions
The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions are possible, but do not always occur. Your doctor or pharmacist can often prevent or manage interactions by changing how you use your medications or by close monitoring. To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor's approval. Some products that may interact with this drug include: "blood thinners" (such as warfarin), colchicine, digoxin, ergot alkaloids (such as dihydroergotamine, ergotamine), methotrexate, HIV NNRTIs (such as delavirdine, efavirenz, etravirine, nevirapine), probenecid, some HIV protease inhibitors (such as atazanavir, darunavir, lopinavir, ritonavir, saquinavir, tipranavir), rifamycins (such as rifabutin), live bacterial vaccines. Many drugs besides clarithromycin may affect the heart rhythm (QT prolongation). Examples include amiodarone, cisapride, disopyramide, dofetilide, pimozide, propafenone, quinidine, sotalol, among others. Therefore, before using this product, report all medications you are currently using to your doctor or pharmacist. Some products need stomach acid so that the body can absorb them properly (such as calcium/iron supplements, azole antifungals including ketoconazole). Lansoprazole decreases stomach acid, so it may change how well these other products work. Before using lansoprazole, consult your doctor or pharmacist about the other medications you take and for advice on how to reduce or avoid these types of interactions. Clarithromycin can slow down the removal of other medications from your body, which may affect how they work. Examples of affected drugs include some benzodiazepines (such as alprazolam, triazolam), carbamazepine, eletriptan, eplerenone, some drugs used to treat erectile dysfunction (such as sildenafil, vardenafil), fentanyl, fesoterodine, ixabepilone, maraviroc, some drugs for organ transplant (such as cyclosporine, tacrolimus, sirolimus), ranolazine, repaglinide, silodosin, some "statin" drugs (such as atorvastatin, lovastatin, simvastatin), temsirolimus, theophylline, tolterodine, among others. This medication may interfere with certain laboratory tests (including urine glucose test), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug. This document does not contain all possible drug interactions. Keep a list of all the products you use. Share this list with your doctor and pharmacist to lessen your risk for serious medication problems.